Write a program to find transpose of a square matrix mat[][] of size N*N. Transpose of a matrix is obtained by changing rows to columns and columns to rows.

Input:
The first line of input contains an integer T, denoting the number of testcases. Then T test cases follow. Each test case contains an integer N, denoting the size of the square matrix. Then in the next line are N*N space separated values of the matrix.

Output:
For each test case output will be the space separated values of the transpose of the matrix

Constraints:
1 <= T <= 15
1 <= N <= 20
-10^{3} <= mat[i][j] <= 10^{3}