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

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