UVA1633 禁止的回文子串 Dyslexic Gollum

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=825&page=show_problem&problem=4508 [PDF](https://uva.onlinejudge.org/external/16/p1633.pdf)

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