diff --git a/mainj.py b/mainj.py
index cc08357..89807d7 100644
--- a/mainj.py
+++ b/mainj.py
@@ -1,4 +1,4 @@
-def longestCommonPrefix(strs) -> str:
+def longestCommonPrefix(strs):
     s = min(strs, key=len)
     prefix = []
     for i in range(len(s)):