diff --git a/map1.py b/map1.py
index 83b8e33a4c28367c0295ce26b421f5f7294bf9d5..a7c7cefe9460d815b72c3db3a5177a521c4dacb8 100644
--- a/map1.py
+++ b/map1.py
@@ -12,6 +12,7 @@ def map1(vote_str):
             else:
                 ret = vote[j] + ">" + vote[i] + ",0"
             print(ret)
-            test_ret += ret
-            test_ret += '\n'
-    return test_ret
+with open(sys.argv[1]) as f:
+    lines = f.readlines()
+for l in lines:
+    map1(l)