给你一个仅由‘(’和‘)’组成的字符串，判断这个字符串中的括号是否匹配。如果字符串S中的括号匹配，只需要输出原字符串；否则按输入顺序输出该字符串中的不匹配的括号。-Only by giving you a ' ('　and ' )'　a string, the string of brackets to determine whether the match. If the string S of parentheses match, only the output of the original string　or output by the input sequence does not match the string in parentheses.