diff --git a/merge-csv-lists.py b/merge-csv-lists.py
index 90322f3..71473ae 100644
--- a/merge-csv-lists.py
+++ b/merge-csv-lists.py
@@ -2,60 +2,52 @@
 import argparse
 
 
+def split_and_flat(input_string):
+    if "\n" in input_string:
+        _without_newlines = input_string.split("\n")
+        _without_empty = filter(lambda x: x != "", _without_newlines)
+        input_string = ",".join(_without_empty)
+    comma_split = input_string.split(",")
+    flat_list = []
+    for item in comma_split:
+        dash_split = item.split("-")
+        flat_list.extend([value.strip().replace("\n", "") for value in dash_split])
+    return ",".join(flat_list)
+
+
 def unique_combined_list(*inputs):
-    # Combine lists
     combined_list = [
         item.strip().title() for input_list in inputs for item in input_list.split(",")
     ]
-
-    # Create an empty list to store the final unique names
     final_list = []
-
-    # Check for reversed names
     for name in combined_list:
         parts = name.split()
-
-        # If the name has two words, check for its reversed variant
         if len(parts) == 2:
             first, last = parts
             reversed_name = f"{last} {first}"
-
-            # If neither the name nor its reversed variant is in the final list, add the name
             if name not in final_list and reversed_name not in final_list:
                 final_list.append(name)
-        # If it's a single-word name, simply add it if it's not in the final list
         else:
             if name not in final_list:
                 final_list.append(name)
-
-    # Sort the list
     sorted_list = sorted(final_list)
-
-    # Convert the list back to a comma-separated string
     output = ",".join(sorted_list)
-
     return output
 
 
 def main():
-    # Create an argument parser
     parser = argparse.ArgumentParser(
         description="Combine multiple comma-separated lists into one unique sorted list."
     )
-
-    # Add a variable number of input lists
     parser.add_argument("lists", nargs="+", type=str, help="Comma-separated lists.")
-
-    # Parse the arguments
     args = parser.parse_args()
-
-    # If only one list is provided, use it twice
     if len(args.lists) == 1:
         args.lists.append(args.lists[0])
 
-    # Get the unique combined list
-    result = unique_combined_list(*args.lists)
+    # Process each list with split_and_flat if it contains a dash
+    processed_lists = [split_and_flat(lst) if "-" in lst else lst for lst in args.lists]
 
+    result = unique_combined_list(*processed_lists)
     print(result)