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The string APPAPT contains two PAT's as substrings. The first one is
formed by the 2nd, the 4th, and the 6th characters,
and the second one is formed by the 3rd, the 4th, and the 6th characters.
Now given any string, you are supposed to tell the number of PAT's
contained in the string.
输入描述:
Each input file contains one test case. For each case, there is only one line giving a string of no more than 105characters containing only P, A, or T.
输出描述:
For each test case, print in one line the ...
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