diff --git a/src/punctuation/check.py b/src/punctuation/check.py
index e87fd38..2db3e60 100755
--- a/src/punctuation/check.py
+++ b/src/punctuation/check.py
@@ -1,12 +1,48 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-
-target = [
+punctuationPairs = [
     ('‘', '’'),
     ('“', '”'),
     ('《', '》'),
     ('（', '）'),
 ]
 
-print(target[0])
+
+def isLeftPunctuation(char: str) -> bool:
+    for punctuationPair in punctuationPairs:
+        if char == punctuationPair[0]:
+            return True
+    return False
+
+
+def isRightPunctuation(char: str) -> bool:
+    for punctuationPair in punctuationPairs:
+        if char == punctuationPair[1]:
+            return True
+    return False
+
+
+def getLeftPunctuation(char: str) -> str:
+    for punctuationPair in punctuationPairs:
+        if char == punctuationPair[1]:
+            return punctuationPair[0]
+    return ''  # no match
+
+
+def pairsCheck(sentence: str) -> bool:
+    punctuationStack = []
+    sentence = list(sentence)
+    for i in range(0, len(sentence)):
+        char = sentence[i]
+        if isLeftPunctuation(char):
+            punctuationStack.append(char)
+        elif isRightPunctuation(char):
+            if punctuationStack.pop() != getLeftPunctuation(char):
+                return False
+    return len(punctuationStack) == 0
+
+
+print(
+    pairsCheck('测试“这个是OK的《2333》没错‘’”嗯嗯')
+)