P3449 [POI 2006] PAL-Palindromes

Little Johnny enjoys playing with words. He has chosen $n$ palindromes (a palindrome is a wordthat reads the same when the letters composing it are taken in the reverse order, such as dad, eye orracecar for instance) then generated all $n^2$ possible pairs of them and concatenated the pairs intosingle words. Lastly, he counted how many of the so generated words are palindromes themselves. However, Johnny cannot be certain of not having comitted a mistake, so he has asked you to repeatthe very same actions and to give him the outcome. Write a programme which shall perform thistask for you. TaskWrite a programme which: reads the palindromes given by Johnny from the standard input, determines the number of words formed out of pairs of palindromes from the input, which are palindromes themselves, writes the outcome to the standard output.

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