diff --git a/clean_input.py b/clean_input.py
index a0faa71..b2c8062 100644
--- a/clean_input.py
+++ b/clean_input.py
@@ -71,3 +71,44 @@ def io_int(message: str) -> int:
 
         except (ValueError, NameError):
             print("Eingabe nicht gültig, bitte wiederhole deine Eingabe.")
+
+def io_list(message: str, options: list):
+    """
+    check card selection
+    :param message: 1a
+    :param options: [{'id': 3, 'number': 0, 'letter': 'd'}, {'id': 9, 'number': 1, 'letter': 'b'}]
+    :return:
+    """
+    while True:
+        try:
+            i = str(input(message))
+
+        except (ValueError, NameError):
+            i = 0
+            print("Eingabe nicht gültig, bitte wiederhole deine Eingabe.")
+
+        if i in options:
+            return i
+
+        else:
+            if i == "q":
+                print(
+                    "---------------------\nSpiel wird beendet...\n---------------------")
+                sys.exit()
+            elif i == "r":
+                print(
+                    "---------------------\nSpiel wird neu gestartet...\n---------------------")
+                quartett.main()
+            else:
+                print('Noch nicht ganz richtig. Hast du deine Auswahl auch richtig geschrieben?')
+
+def define_card_stack():
+    """
+
+    :return:
+    """
+    for i in range(4):
+        for l in "abcdefgh":
+            d = {"id": x, "number": i, "letter": l}
+            card_stack.append(d)
+            x += 1
\ No newline at end of file
diff --git a/quartett.py b/quartett.py
index df3b22b..ab44225 100644
--- a/quartett.py
+++ b/quartett.py
@@ -12,16 +12,10 @@ def central_function():
     active = 0  # contains index of the active player
 
     card_stack, players_with_cards, players = initialize()
-    # print(card_stack)
-    # print(str(len(card_stack)))
-    #
-    # print(players_with_cards)
-    # print(str(len(players_with_cards)))
-    #
-    # print(players)
 
-    #while deckP1 and deckP2 and deckP3 not empty:
-    #    round(..., players_with_cards, players)
+    ..., players_with_cards, players = initialize()[0], initialize()[1], initialize()[2]
+    while deckP1 and deckP2 and deckP3 not empty:
+        round(..., players_with_cards, players)
         # TO DO implement active_player rotation
 
 
@@ -95,9 +89,9 @@ def initialize():
         # Add list of dicts (cards) to players
         players_with_cards.append({"player": players[i], "cards_on_hand": cards_of_player})
 
+
     return card_stack, players_with_cards, players
 
-central_function()
 '''
 players_with_cards = [
     {'player': 'player0', 'cards_on_hand': [{'id': 13, 'number': 1, 'letter': 'f'},