diff --git a/problemset/isomorphic-strings/README.md b/problemset/isomorphic-strings/README.md
index 534f661..414d09e 100644
--- a/problemset/isomorphic-strings/README.md
+++ b/problemset/isomorphic-strings/README.md
@@ -14,7 +14,7 @@
 
 ### 示例 1:
 ```typescript
-输入：s = "egg", t = "add"
+输入：s = "egg", t = "add" 
 输出：true
 ```