B"Long ago, when Petya was a schoolboy, he was very much interested in the Petr# language grammar. During one lesson Petya got interested in the following question: how many different continuous substrings starting with the sbegin and ending with the send (it is possible sbegin xe2 x80 x89= xe2 x80 x89send), the given string t has. Substrings are different if and only if their contents aren't equal, their positions of occurence don't matter. Petya wasn't quite good at math, that's why he couldn't count this number. Help him! The input file consists of three lines. The first line contains string t. The second and the third lines contain the sbegin and send identificators, correspondingly. All three lines are non-empty strings consisting of lowercase Latin letters. The length of each string doesn't exceed 2000 characters. Output the only number -- the amount of different substrings of t that start with sbegin and end with send. In the third sample there are four appropriate different substrings. They are: ab, abab, ababab, abababab. In the fourth sample identificators intersect."...