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Regular Expression
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26[68]+?[687]+?4
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g
Input 1
1
New
Samples of valid strings are like 26874 '266868874', '268787866668887774', '268688788774'. 26666868886688874 Invalid strings are like '263874', '268734', '2688668778868714', etc... 2324235235980980
Extraction
Samples of valid strings are like 26874 '266868874', '268787866668887774', '268688788774'. 26666868886688874 Invalid strings are like '263874', '268734', '2688668778868714', etc... 2324235235980980