Given a string, find the longest substring which is palindrome in Linear time O(N).
The first line of input contains an integer T denoting the no of test cases . Then T test cases follow. The only line of each test case contains a string.
For each test case print the Longest Palindromic Substring.
1 <= T <= 100
1 <= N <= 50
Note:The Input/Ouput format and Example given are used for system's internal purpose, and should be used by a user for Expected Output only. As it is a function problem, hence a user should not read any input from stdin/console. The task is to complete the function specified, and not to write the full code.
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