Given a string S containing all the characters and a character X, the task is to find last index of X in string S.
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case consists of two lines. First line of each test case contains a string S and the second line contains a character X.
For each test case, print the last index in new line, If X is not present in the string print "-1".
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