[fix:] plz/pplz was not normalized during address creation

DataStore/DataStructures.cs

@@ -178,6 +178,23 @@ public class KasPerson
     public string abteilung { get; set; }
     public string funktionad { get; set; }
 
+    public string used_plz { get; set; } = "";
+
+    public static void SetUsedPLZ(int id, string plz)
+    {
+        foreach (var set in Settings._instance.addressSets.addresses)
+        {
+            foreach (var add in set.KasPersons)
+            {
+                if (add.id == id)
+                {
+                    add.used_plz = plz;
+                    return;
+                }
+            }
+        }
+    }
+
     public static int GenerateNewID(int base_id)
     {
         //var newid = 100000 + base_id;

DataStore/Settings.cs

@@ -70,6 +70,9 @@ public class PdfExportSettings
 
     public double fontSize { get; set; } = 9;
     public double smallFontSize { get; set; } = 6;
+    public bool exportRunningSheets { get; set; } = true;
+    public int rsNumGrouped { get; set; } = 25;
+    public int rsPlzStartpoint { get; set; } = 2;
 }
 
 public class Global
@@ -162,6 +165,19 @@ public class Customer
     public char separator { get; set; } = ',';
     public int ID { get; }
 
+    public static Customer GetCustomerByID(int id)
+    {
+        foreach (var customer in Settings._instance.customers.customers)
+        {
+            if (id == customer.ID)
+            {
+                return customer;
+            }
+        }
+
+        return null;
+    }
+
 
     // public static int GetIDByCustomerListItem(string item_content)
     // {

MainWindow.axaml

@@ -121,7 +121,7 @@
                                                FontWeight="Bold" />
                                     </StackPanel>
                                 </Button>
-                                <Button Width="250" IsEnabled="False"
+                                <Button Width="250" IsEnabled="False" Click="BtnShorten_OnClick"
                                         HorizontalContentAlignment="Center" x:Name="BtnShorten"
                                         Margin="0,0,0,10">
                                     <StackPanel Orientation="Horizontal">
@@ -220,14 +220,18 @@
                                             </StackPanel>
                                             <Label FontSize="9" Content="Nur Elemente, die NICHT doppelt sind" />
                                         </StackPanel>
-
                                     </Button>
                                 </StackPanel>
-                                <StackPanel Orientation="Vertical" HorizontalAlignment="Center">
+                                <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Spacing="50">
-                                    <RadioButton Content="Vergleiche nach refsid" IsChecked="True" x:Name="RbComprefsid"></RadioButton>
+                                    <StackPanel Orientation="Vertical" >
-                                    <RadioButton Content="Vergleiche nach finaler Adresse" IsChecked="False" x:Name="RbCompfinAd"></RadioButton>
+                                        <RadioButton Content="Vergleiche nach refsid" IsChecked="True" x:Name="RbComprefsid"></RadioButton>
+                                        <RadioButton Content="Vergleiche nach finaler Adresse" IsChecked="False" x:Name="RbCompfinAd"></RadioButton>
+                                    </StackPanel>
+                                    <StackPanel Orientation="Vertical">
+                                        <CheckBox HorizontalAlignment="Left" x:Name="CbMergeExportUnmerged" IsChecked="False">Speichere Unverarbeitete in neuem Verteiler</CheckBox>
+                                        <CheckBox HorizontalAlignment="Left" x:Name="CbMergeDeleteOld" IsChecked="False">Lösche ursprüngliche Sets</CheckBox>
+                                    </StackPanel>
                                 </StackPanel>
-                                <CheckBox HorizontalAlignment="Center" x:Name="CbMergeExportUnmerged" IsChecked="False">Speichere Unverarbeitete in neuem Verteiler</CheckBox>
                             </StackPanel>
                         </Grid>
                         <Grid Grid.Row="2" Margin="20" ColumnDefinitions="*,5*,*" IsVisible="False" x:Name="GrdExportMarginOptions">
@@ -250,6 +254,7 @@
                                             <Label Grid.Column="0" Content="Zellenrand rechts (mm)"></Label>
                                             <NumericUpDown Grid.Column="1" x:Name="NudExpMargCellPaddingRight" Minimum="0" Maximum="20" Value="5"></NumericUpDown>
                                         </Grid>
+                                        <CheckBox Content="Laufzettel erstellen" x:Name="CbExpRnsEnable"></CheckBox>
                                     </StackPanel>
                                     
                                     <StackPanel Grid.Column="1" Orientation="Vertical" Spacing="10">
@@ -269,6 +274,10 @@
                                             <Label Content="Zellenabstand links"></Label>
                                             <NumericUpDown Grid.Column="1" x:Name="TbExpMargMarginLeft" Minimum="0" Maximum="20" Value="0"></NumericUpDown>
                                         </Grid>
+                                        <Grid ColumnDefinitions="*,*">
+                                            <Label Grid.Column="0" Content="Anzahl gruppierter Sendungen"></Label>
+                                            <NumericUpDown Grid.Column="1" x:Name="NudExpRnsPlzcount" Minimum="1" Maximum="10000" Value="25"></NumericUpDown>
+                                        </Grid>
                                     </StackPanel>
                                     
                                     <StackPanel Grid.Column="2" Orientation="Vertical" Spacing="10">
@@ -288,6 +297,10 @@
                                             <Label Grid.Column="0" Content="Schriftgröße (klein)"></Label>
                                             <NumericUpDown Grid.Column="1" x:Name="NudExpMargSmallFontSize" Minimum="3" Maximum="30" Value="6"></NumericUpDown>
                                         </Grid>
+                                        <Grid ColumnDefinitions="*,*">
+                                            <Label Grid.Column="0" Content="Gruppierpunkt"></Label>
+                                            <NumericUpDown Grid.Column="1" x:Name="NudExpRnsPlzStartpoint" Minimum="1" Maximum="10" Value="2"></NumericUpDown>
+                                        </Grid>
                                     </StackPanel>
                                 </Grid>
                                 <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
@@ -481,12 +494,20 @@
                                                  TextChanged="TbSettingsCustomerSenderAddress_OnTextChanged"
                                                  x:Name="TbSettingsCustomerSenderAddress" />
                                     </Grid>
-                                    <Grid ColumnDefinitions="150,*">
+                                    <Grid ColumnDefinitions="150,*,Auto">
                                         <Label Content="CSV-Trennzeichen" />
                                         <TextBox Grid.Column="1" Watermark=","
-                                                 HorizontalAlignment="Stretch"
+                                                 HorizontalAlignment="Stretch" Margin="0,0,5,0"
                                                  TextChanged="TbSettingsCustomerCsvSeparator_OnTextChanged"
                                                  x:Name="TbSettingsCustomerCsvSeparator" />
+                                        <StackPanel Grid.Column="2" Orientation="Horizontal" Spacing="5">
+                                            <Button Click="ChangeCSVDivider" Content=","></Button>
+                                            <Button Click="ChangeCSVDivider" Content=";"></Button>
+                                            <Button Click="ChangeCSVDivider" Content="TAB"></Button>
+                                            <Button Click="ChangeCSVDivider" Content="|"></Button>
+                                            <Button Click="ChangeCSVDivider" Content="SPACE"></Button>
+                                            <Button Click="ChangeCSVDivider" Content=":"></Button>
+                                        </StackPanel>
                                     </Grid>
                                     <Grid ColumnDefinitions="150,*">
                                         <Label Content="Address-Patch-Info" />

MainWindow.axaml.cs

@@ -96,7 +96,28 @@ public partial class MainWindow : Window
 
         new ResultWindow(result, addresSetID).Show();
 
+        Settings.Save();
+        
+        //await MessageBox.Show(_instance, $"{result.Count} Einträge fehlerhaft.", "Fertig");
+    }
+    
+    private async void StartAddressShortener(KasAddressList set)
+    {
+        //var addresses = DataImport.ImportKasAddressList(path); // Ihr Code hier
 
+        var progressWindow = new ProgressWindow();
+
+        progressWindow.Show(_instance);
+
+        var processor = new AddressShortener(progressWindow);
+        await processor.Perform(set);
+
+        // foreach (var item in result)
+        // {
+        // }
+
+        progressWindow.Close();
+        Settings.Save();
         //await MessageBox.Show(_instance, $"{result.Count} Einträge fehlerhaft.", "Fertig");
     }
 
@@ -391,7 +412,7 @@ public partial class MainWindow : Window
         progressWindow.Show(_instance);
 
         var processor = new CombineAddresses(progressWindow);
-        var result = await processor.Perform(address_lists, type, comb_type, CbMergeExportUnmerged.IsChecked);
+        var result = await processor.Perform(address_lists, type, comb_type, CbMergeExportUnmerged.IsChecked, CbMergeDeleteOld.IsChecked);
 
         if (result.Item1 != null)
             result.Item1.owner_id = owner_id;
@@ -543,7 +564,7 @@ public partial class MainWindow : Window
         var selected_path = paths[0].Path;
 
         foreach (var customer in Settings._instance.customers.customers)
-            if (customer.ID == ((Customer)LstSettingsCustomers.SelectedItems[0]).ID)
+            if (customer == ((Customer)LstCustomers.SelectedItems[0]))
             {
                 if (customer.patch == null)
                 {
@@ -617,6 +638,7 @@ public partial class MainWindow : Window
             BtnCheck.IsEnabled = true;
             BtnCombine.IsEnabled = true;
             BtnGenerateLabels.IsEnabled = true;
+            BtnShorten.IsEnabled = true;
 
             // BtnRepair.IsEnabled = true;
             // BtnShorten.IsEnabled = true;
@@ -681,7 +703,7 @@ public partial class MainWindow : Window
             list.Add((KasAddressList)item);
         try
         {
-            StartCombine(list, Convert.ToInt32(LstCustomers.SelectedItem), "difference", GetCombiningTyp());
+            StartCombine(list, Convert.ToInt32((LstCustomers.SelectedItem as Customer).ID), "difference", GetCombiningTyp());
         }
         catch
         {
@@ -712,11 +734,11 @@ public partial class MainWindow : Window
             list.Add((KasAddressList)item);
         try
         {
-            StartCombine(list, Convert.ToInt32(LstCustomers.SelectedItem.ToString().Split(" - ")[0]), "intersection", GetCombiningTyp());
+            StartCombine(list, Convert.ToInt32((LstCustomers.SelectedItem as Customer).ID), "intersection", GetCombiningTyp());
         }
-        catch
+        catch (Exception ex)
         {
-                
+            Console.WriteLine("Error while trying to start intersection: " + ex.Message);
         }
     }
 
@@ -739,7 +761,7 @@ public partial class MainWindow : Window
         foreach (var item in LstCustomerAdressSets.SelectedItems)
             list.Add((KasAddressList)item);
 
-        StartCombine(list, Convert.ToInt32(LstCustomers.SelectedItem.ToString().Split(" - ")[0]), "symdiff", GetCombiningTyp());
+        StartCombine(list, Convert.ToInt32((LstCustomers.SelectedItem as Customer).ID), "symdiff", GetCombiningTyp());
     }
 
     private async void BtnGenerateLabels_OnClick(object? sender, RoutedEventArgs e)
@@ -1086,4 +1108,33 @@ public partial class MainWindow : Window
         }
         RefreshCustomerItems();
     }
+
+    private void BtnShorten_OnClick(object? sender, RoutedEventArgs e)
+    {
+        MakeCalcManVisible();
+        if (LstCustomerAdressSets.SelectedIndex == -1)
+        {
+            MessageBox.Show(null, "Bitte zunächst ein Adress-Set auswählen", "Kein Adress-Set ausgewählt");
+            return;
+        }
+
+        StartAddressShortener((KasAddressList)LstCustomerAdressSets.SelectedItem);
+    }
+
+    private void ChangeCSVDivider(object sender, RoutedEventArgs e)
+    {
+        try
+        {
+            string div = (sender as Button).Content as string;
+            if (div == "TAB") div = "\t";
+            if (div == "SPACE") div = " ";
+            TbSettingsCustomerCsvSeparator.Text = div;
+            Settings.Save();
+        }
+        catch
+        {
+            Console.WriteLine("Error while parsing");
+        }
+         
+    }
 }

Tasks/AddressCreation.cs

@@ -104,7 +104,9 @@ public static class AddressCreator
         // Alternative A: pplz valid and city existing
         if (!string.IsNullOrEmpty(address.ort) && CheckPLZ(address.pplz, address.land))
         {
-            string_address = address.pplz + " " + address.ort + "\n" + string_address;
+            string pplz = NormalizeGermanPLZ(address.pplz);
+            KasPerson.SetUsedPLZ(id, pplz);
+            string_address = pplz + " " + address.ort + "\n" + string_address;
             address_line_count++;
             if (!string.IsNullOrWhiteSpace(address.postfach))
             {
@@ -150,7 +152,9 @@ public static class AddressCreator
         } // Alternative B: plz valid and city existing 
         else if (!string.IsNullOrEmpty(address.ort) && CheckPLZ(address.plz, address.land))
         {
-            string_address = address.plz + " " + address.ort + "\n" + string_address;
+            string plz = NormalizeGermanPLZ(address.plz);
+            KasPerson.SetUsedPLZ(id, plz);
+            string_address = plz + " " + address.ort + "\n" + string_address;
             address_line_count++;
             if (!string.IsNullOrWhiteSpace(address.strasse))
             {
@@ -249,4 +253,23 @@ public static class AddressCreator
         // For non-German countries, accept any non-empty postal code
         return true;
     }
+    
+    public static string NormalizeGermanPLZ(string plz)
+    {
+        if(plz.Length == 5) return plz;
+        if(plz.Length > 5)
+        {
+            return plz.Substring(0, 5);
+        }
+
+        if (plz.Length < 5)
+        {
+            int toadd = 5 - plz.Length;
+            for (int i = 0; i < toadd; i++)
+            {
+                plz = "0" + plz;
+            }
+        }
+        return plz;
+    }
 }

Tasks/AddressShortener.cs

@@ -0,0 +1,79 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Threading.Tasks.Dataflow;
+
+namespace Logof_Client;
+
+public class AddressShortener(ProgressWindow progressWindow)
+{
+    private readonly ProgressWindow _progress = progressWindow;
+
+    public async Task Perform(KasAddressList list)
+    {
+        // find doubled addresses by refsid
+        List<int> doubled_ids = new List<int>();
+        for (int i = 0; i < list.KasPersons.Count; i++)
+        {
+            var address =  list.KasPersons[i];
+            for (int j = 0; j < list.KasPersons.Count; j++)
+            {
+                if (i == j) continue;
+                var sec_address =  list.KasPersons[j];
+                
+                if (address.refsid == sec_address.refsid && !doubled_ids.Contains(address.refsid) && address.refsid != 0)
+                {
+                    doubled_ids.Add(address.refsid);
+                }
+            }
+        }
+        
+        
+        // delete doubled addresses by refsid
+        foreach (int id in doubled_ids)
+        {
+            // does this remove both of the doubled addresses?
+            list.KasPersons.Remove(list.KasPersons.FirstOrDefault(x => x.refsid == id));
+        }
+
+        List<int> toRemove = new List<int>();
+        foreach (var address in list.KasPersons)
+        {
+            try
+            {
+                if (address.PersonError.errors.Contains(AddressCheck.ErrorTypes.NoPLZorPPLZ))
+                {
+                    toRemove.Add(address.id);
+                }
+                else if (address.PersonError.errors.Contains(AddressCheck.ErrorTypes.PlzNotUsable) &&
+                         address.PersonError.errors.Contains(AddressCheck.ErrorTypes.PPlzNotUsable))
+                {
+                    toRemove.Add(address.id);
+                } else if (address.PersonError.errors.Contains(AddressCheck.ErrorTypes.PlzNotUsable) &&
+                           address.PersonError.warnings.Contains(AddressCheck.WarningTypes.NoPPLZ))
+                {
+                    toRemove.Add(address.id);
+                }
+                else if (address.PersonError.errors.Contains(AddressCheck.ErrorTypes.PPlzNotUsable) &&
+                         address.PersonError.warnings.Contains(AddressCheck.WarningTypes.NoPLZ))
+                {
+                    toRemove.Add(address.id);
+                }
+            }
+            catch
+            {
+                Console.WriteLine("PersonError not accessible: " + address.id);
+            }
+        }
+        
+        // delete doubled addresses by refsid
+        foreach (int id in toRemove)
+        {
+            // does this remove both of the doubled addresses?
+            list.KasPersons.Remove(list.KasPersons.Find(x => x.id == id));
+        }
+        
+        //return null;
+    }
+}

Tasks/CombineAddresses.cs

@@ -24,13 +24,29 @@ public class CombineAddresses
     }
 
     public async Task<(KasAddressList, KasAddressList)> Perform(List<KasAddressList> address_lists, string type, CombineType comb_type,
+        bool? exportUnused, bool? deleteOld)
+    {
+        var result = await Execute(address_lists,type,comb_type,exportUnused);
+
+        if (deleteOld == true)
+        {
+            foreach (var list in address_lists)
+            {
+                Settings._instance.addressSets.addresses.Remove(list);
+            }
+        }
+
+        return result;
+
+    }
+
+    private async Task<(KasAddressList, KasAddressList)> Execute(List<KasAddressList> address_lists, string type, CombineType comb_type,
         bool? exportUnused)
     {
         if (type == "difference") return await Difference(address_lists, comb_type, exportUnused);
         if (type == "union") return await Union(address_lists, comb_type, exportUnused);
         if (type == "intersection") return await Intersection(address_lists, comb_type, exportUnused);
         if (type == "symdiff") return await SymmetricDifference(address_lists, comb_type, exportUnused);
-
         return (null, null);
     }
 

Tasks/PdfBuilder.cs

@@ -104,7 +104,17 @@ public class PdfBuilder
                 addresses.Add(addr);
         }
 
+        if (addresses.Count == 0)
+        {
+            MessageBox.Show(MainWindow._instance, "Keine validen Adressen konnten generiert werden. Abbruch.", "Fehler");
+            return;
+        }
         CreateAddressLabelPdfWithPlaceholder(addresses, placeholderText, outputPath);
+
+        if (_settings.exportRunningSheets)
+        {
+            ExportRunningSheets(addressSetId, outputPath);
+        }
     }
 
     /// <summary>
@@ -387,4 +397,142 @@ public class PdfBuilder
         if (left < 0 || top < 0 || right < 0 || bottom < 0)
             throw new ArgumentException("Margins cannot be negative");
     }
+
+    public void ExportRunningSheets(int setID, string path)
+    {
+        if (path.EndsWith(".pdf"))
+        {
+            path = path.Substring(0, path.Length - 4);
+            path = path + "-Laufzettel.pdf";
+        }
+        else
+        {
+            path = path + "-Laufzettel.pdf";
+        }
+
+        CreateRunningSheets(setID, path);
+
+    }
+
+    public void CreateRunningSheets(int setID, string path)
+    {
+        KasAddressList list = Settings._instance.addressSets.GetAddressSetByID(setID);
+        var document = new PdfDocument();
+        document.Info.Title = $"Laufzettel für {list.Name}";
+        document.Info.Subject = "powered by logofclient";
+        document.Info.Author = "logofclient";
+
+        int margin = 50;
+
+        var grouped_nums = GroupAddresses(setID);
+
+        foreach (var result in grouped_nums)
+        {
+            var page = document.AddPage();
+            page.Size = PageSize.A4;
+
+            var gfx = XGraphics.FromPdfPage(page);
+
+            var width = page.Width.Point-margin;
+            var height = page.Height.Point-margin;
+            gfx.DrawLine(XPens.Black, margin, margin, margin, height);
+            gfx.DrawLine(XPens.Black, margin, margin, width, margin);
+            gfx.DrawLine(XPens.Black, width, margin, width, height);
+            gfx.DrawLine(XPens.Black, margin, height, width, height);
+
+            var boldfont = new XFont("Cantarell", 11, XFontStyleEx.Bold);
+            var font = new XFont("Cantarell", 11, XFontStyleEx.Regular);
+            var bigboldfont = new XFont("Cantarell", 35, XFontStyleEx.Bold);
+            
+            // Versandinfo
+            gfx.DrawString($"Versand {list.Name}", boldfont, XBrushes.Black,
+                new XRect(margin+5, margin, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"Start: ", font, XBrushes.Black,
+                new XRect(margin+5, margin+25, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"{result.Item3}", font, XBrushes.Black,
+                new XRect(margin+75, margin+25, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"Ende: ", font, XBrushes.Black,
+                new XRect(margin+5, margin+40, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"{result.Item4}", font, XBrushes.Black,
+                new XRect(margin+75, margin+40, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"Kunde: ", font, XBrushes.Black,
+                new XRect(margin+5, margin+55, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"{Customer.GetCustomerByID(list.owner_id).name}", font, XBrushes.Black,
+                new XRect(margin+75, margin+55, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"Absender: ", font, XBrushes.Black,
+                new XRect(margin+5, margin+70, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"{Customer.GetCustomerByID(list.owner_id).sender_address}", font, XBrushes.Black,
+                new XRect(margin+75, margin+70, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"Anzahl: ", font, XBrushes.Black,
+                new XRect(margin+5, margin+85, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"{result.Item5}", font, XBrushes.Black,
+                new XRect(margin+75, margin+85, width-margin, 25), XStringFormats.CenterLeft);
+            
+            // logofclient ad
+            gfx.DrawString($"powered by logofclient", font, XBrushes.Black,
+                new XRect(margin+5, height-55, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"(c) 2026 MyPapertown", font, XBrushes.Black,
+                new XRect(margin+5, height-40, width-margin, 25), XStringFormats.CenterLeft);
+            gfx.DrawString($"mypapercloud.de/logof", font, XBrushes.Black,
+                new XRect(margin+5, height-25, width-margin, 25), XStringFormats.CenterLeft);
+
+            
+            int total_frac = 0;
+            foreach (var item in grouped_nums)
+            {
+                if (item.Item2 == result.Item2) total_frac++;
+            }
+            
+            // group number
+            gfx.DrawString($"{result.Item2}", bigboldfont, XBrushes.Black,
+                new XRect(margin, margin, width-margin, (height-margin)/2), XStringFormats.Center);
+            gfx.DrawString($"Fraktion {result.Item1}/{total_frac}", font, XBrushes.Black,
+                new XRect(margin, margin, width-margin, (height-margin)/2 + 50), XStringFormats.Center);
+        }
+        
+        document.Save(path);
+    }
+
+    /// <summary>
+    /// Calculates address groups to summarize for the single pages of the running sheets.
+    /// </summary>
+    /// <param name="setID"></param>
+    /// <returns>List of quadruples consisting of a number and the starting of the plz, as well as first, last plz and total amount of addresses</returns>
+    public List<(int, string, string, string, int)> GroupAddresses(int setID)
+    {
+        int grpcount = Settings._instance.pdfExport.rsNumGrouped; // Amount of addresses per group
+        int stpoint = Settings._instance.pdfExport.rsPlzStartpoint; // group starting point (first n characters of the plz)
+        KasAddressList list = Settings._instance.addressSets.GetAddressSetByID(setID);
+        if (list == null)
+            throw new Exception("AddressSet nicht gefunden");
+        
+        List<(int, string, string, string, int)> output = new();
+
+        List<IGrouping<string, KasPerson>> sorted_list = list.KasPersons
+            .Where(x => !string.IsNullOrEmpty(x?.used_plz) &&
+                        x.used_plz.Length >= stpoint)
+            .OrderBy(x => x.used_plz)
+            .GroupBy(x => x.used_plz.Substring(0, stpoint))
+            .ToList();
+        
+        foreach (var group in sorted_list)
+        {
+            string start = group.Key;
+            int fraktion = 0;
+
+            for (int count = 0; count < group.Count(); count += grpcount)
+            {
+                fraktion++;
+
+                int currentGroupSize = Math.Min(grpcount, group.Count() - count);
+
+                string first = group.ElementAt(count).used_plz;
+                string last = group.ElementAt(count + currentGroupSize - 1).used_plz;
+
+                output.Add((fraktion, start, first, last, currentGroupSize));
+            }
+        }
+
+        return output;
+    }
 }