diff --git a/groupby_index.py b/groupby_index.py
index 517bd3c..0c37a6d 100644
--- a/groupby_index.py
+++ b/groupby_index.py
@@ -29,6 +29,7 @@ if __name__ == "__main__":
     test_list = [*range(20,-10,-1)]
     for g in groupby_index(test_list,4):
         print([*g])
+    print("===")
     print([*map(lambda x:[*x],groupby_index([1,2,3,4],2))])
     for g in groupby_index([1,2,3,4],2):
         print([*g])