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Sum of elements in a matrix
       

Given a non null integer matrix,calculate the sum of its elements.

Input: First line contains T , the number of test cases.First line of each test contains 2 integers N,M and N lines follow which contain M spaced integers.

Output:Single line for each test case containing the sum

Constraints: 1<= N,M<=10 , elements of matrix   -1000<=matrix<=1000

Example:
Input:
1

2 3 
1 0 0
8 -9 -1

Output 

-1

**For More Examples Use Expected Output**


Contributor: Yash Kodesia

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