Print matrix in diagonal pattern
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  Difficulty: Easy   Marks: 2

Given a matrix M of n*n size, the task is to complete the function which prints its elements in diagonal pattern as depicted below.


Input:
The first line of input contains an integer denoting the no of test cases. Then T test cases follow. Each test case contains an integer N denoting the size of the square matrix. In the next line are N*N space separated values of the matrix M.

Output:
For each test case output will be the space separated values of the matrix elements in diagnol form.

Constraints:
1<=T<=100
1<=n<=20

Example(To be used only for expected output):
Input:

2
3
1 2 3 4 5 6 7 8 9
2
1 2 3 4
Output:
1 2 4 7 5 3 6 8 9
1 2 3 4



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.

** For More Input/Output Examples Use 'Expected Output' option **

Contributor: Amit Khandelwal
Author: Shubham Joshi 1


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