diff --git a/leetcode/0242.Valid-Anagram/242. Valid Anagram.go b/leetcode/0242.Valid-Anagram/242. Valid Anagram.go
index 81920dd7..72bd7a98 100644
--- a/leetcode/0242.Valid-Anagram/242. Valid Anagram.go	
+++ b/leetcode/0242.Valid-Anagram/242. Valid Anagram.go	
@@ -1,5 +1,26 @@
 package leetcode
 
+// suggestion
+func isAnagram2(s string, t string) bool {
+	hash := map[rune]int{}
+
+	for _, value := range s {
+		hash[value]++
+	}
+
+	for _, value := range t {
+		hash[value]--
+	}
+
+	for _, value := range hash {
+		if value != 0 {
+			return false
+		}
+	}
+
+	return true
+}
+
 // 解法一
 func isAnagram(s string, t string) bool {
 	alphabet := make([]int, 26)
diff --git a/leetcode/0242.Valid-Anagram/242. Valid Anagram_test.go b/leetcode/0242.Valid-Anagram/242. Valid Anagram_test.go
index 15a108ca..8ece1c25 100644
--- a/leetcode/0242.Valid-Anagram/242. Valid Anagram_test.go	
+++ b/leetcode/0242.Valid-Anagram/242. Valid Anagram_test.go	
@@ -45,6 +45,21 @@ func Test_Problem242(t *testing.T) {
 			para242{"rat", "car"},
 			ans242{false},
 		},
+
+		{
+			para242{"a", "ab"},
+			ans242{false},
+		},
+
+		{
+			para242{"ab", "a"},
+			ans242{false},
+		},
+
+		{
+			para242{"aa", "bb"},
+			ans242{false},
+		},
 	}
 
 	fmt.Printf("------------------------Leetcode Problem 242------------------------\n")