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The site has the following in the homepage, "Validate if a given string is numeric." We noticed that the web site also stated " Note It is intended for the problem statement to be ambiguous." It also stated " You should gather all requirements up front before implementing one. Implement wildcard pattern matching with support for ? Matches any single character. Matches any sequence of characters including the empty sequence. The matching should cover the entire input string not partial." The header had Willin as the highest ranking keyword. This keyword was followed by Willin Wang, 王之琳, and 长岛冰泪 which isn't as urgent as Willin.