Given a list of characters, merge all of them into a string.
First line of the input contains an integer T, denoting the number of testcases. Then T test case follows. Each testcase contains two lines:-
The number of characters in the array N.
The array of characters separated by space
For each testcase, print the character array converted into a string.
g e e k s f o r g e e k s
p r o g r a m m i n g
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