UVA390 Letter Sequence Analysis

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=5&page=show_problem&problem=326 [PDF](https://uva.onlinejudge.org/external/3/p390.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA390/f4a33426547e911c0bac049d35f613cc58efa62c.png)

Input Format

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Output Format

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