小慕正在维护自己的项目代码，需要从中找出重复的代码片段，以便后续进行代码优化，请你帮小慕找出重复的代码。 重复代码查找方法：以字符串形式给出两段代码text1、text2（字符串长度1 < len(text1)，len(text2) <= 100，由英文字母、数字和空格组成），找出两段代码中的。 如果不存在公共子串，返回空字符串。注意。
提示：带虚线的词点一下有通俗解释。
输入描述
<div data-page-id="CsCzdCpeCoh7WmxMD8Acfk90nHd" data-docx-has-block-data="false"> <div style="white-space-collapse:preserve;" class="ace-line ace-line old-record-id-DOU4dogI8osy6Uxk5SscOCJBn58"> 输入的参数<code>text1</code>，<code>text2</code>分别表示两行代码 </div> </div> <span data-lark-record-data="{"rootId":"CsCzdCpeCoh7WmxMD8Acfk90nHd","text":{"initialAttributedTexts":{"text":{"0":"输入的参数text1，text2分别表示两行代码"},"attribs":{"0":"*0+5*0*1+5*0+1*0*1+5*0+8"}},"apool":{"numToAttrib":{"0":["author","7115054903550050305"],"1":["inlineCode","true"]},"nextNum":2}},"type":"text","referenceRecordMap":{},"extra":{"mention_page_title":{},"external_mention_url":{}},"isKeepQuoteContainer":false,"isFromCode":false,"selection":[{"id":7,"type":"text","selection":{"start":0,"end":24},"recordId":"DOU4dogI8osy6Uxk5SscOCJBn58"}],"payloadMap":{},"isCut":false}" data-lark-record-format="docx/text" class="lark-record-clipboard"></span>
输出描述
<div data-page-id="CsCzdCpeCoh7WmxMD8Acfk90nHd" data-docx-has-block-data="false"> <div style="white-space-collapse:preserve;" class="ace-line ace-line old-record-id-Moa6dMmWooOKYIx5ccrc0Lp0ner"> 输出任一最长公共子串。 </div> </div> <span data-lark-record-data="{"rootId":"CsCzdCpeCoh7WmxMD8Acfk90nHd","text":{"initialAttributedTexts":{"text":{"0":"输出任一最长公共子串。"},"attribs":{"0":"*0+b"}},"apool":{"numToAttrib":{"0":["author","7115054903550050305"]},"nextNum":1}},"type":"text","referenceRecordMap":{},"extra":{"mention_page_title":{},"external_mention_url":{}},"isKeepQuoteContainer":false,"isFromCode":false,"selection":[{"id":9,"type":"text","selection":{"start":0,"end":11},"recordId":"Moa6dMmWooOKYIx5ccrc0Lp0ner"}],"payloadMap":{},"isCut":false}" data-lark-record-format="docx/text" class="lark-record-clipboard"></span>
示例
示例 1
输入
hello123world hello123abc4
输出
hello123
示例 2
输入
private_void_method public_void_method
输出
_void_method
示例 3
输入
hiworld hiweb
输出
hiw
时间限制 1000 ms · 内存限制 128 MB