Given a list of names, display the longest name.
First line of input contains an integer T, the number of test cases. For each test case, there will be two lines. First line contains integer N i.e. total number of names, and second line contains N space seperated names of different length.
Longest name in the list of names.
1 <= T <= 10
1 <= N <= 10
1 <= |length of name| <= 1000