Given an array of numbers form 0 to 9 of size N. Your task is to rearrange elements of the array such that after combining all the elements of the array number formed is maximum.
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. The first line of each test case contains an integer N denoting the number of elements in the array. Then in the next line are N space seperated integers denoting the elements of the array.
For each test case print a single line a number denoting the largest number that can be achieved by rearranging the elements of the array.
1 <= T <= 103
1 <= N <= 107
0 <= Ai <= 9
9 0 1 3 0
1 2 3
Testcase1: Largest number is 93100 which can be formed from array digits.