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, -1000<=elements of matrix<=1000
1 0 0
8 -9 -1
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