This is a palindrome number on the judgment algorithm!
这是一个关于回文数的判断算法！
For each case, print the case number and the total number of ways to remove letters from W such that it becomes a palindrome.
题意：给你一字符串，问你在这字符串里去掉一些字符构成回文串，有多少种方法；
For each case, print the case number and the total number of ways to remove letters from W such that it becomes a palindrome.
题意：给你一字符串，问你在这字符串里去掉一些字符构成回文串，有多少种方法；
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