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A.EvenButNotEven(https://www.oschina.net/action/GoToLink?urlhttp%3A%2F%2Fcodeforces.com%2Fcontest%2F1291%2Fproblem%2FA)题意：给你一个很长的数，可以删减里面的任意数字，要求本身不能除以2，但是该数的各位和能除以2，输出任意符合

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