diff --git a/s1_a53_6.py b/s1_a53_6.py
index 144b10e..10ec606 100644
--- a/s1_a53_6.py
+++ b/s1_a53_6.py
@@ -22,12 +22,14 @@ if __name__ == "__main__":
 
     # Aufgabe 5
     list_to_sort = [[1, 2, 3], [2, 1, 3], [4, 0, 1]]
+    list_to_sort.sort(key=lambda x: x[1])  # in-build-function
+
     for row in range(len(list_to_sort)):
         for next_row in range(row + 1, len(list_to_sort)):
             if list_to_sort[row][1] > list_to_sort[next_row][1]:
                 list_to_sort[row], list_to_sort[next_row] = list_to_sort[next_row], list_to_sort[row]
 
-    print("The sorted list" + str(list_to_sort))
+    print("The sorted list " + str(list_to_sort))
 
 
     # Aufgabe 6