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Geek has a rosarium and it has N*M slots, some of them are empty and some of them have roses. Given N*M character array consists of 0's and 1's. 0 represents an empty spot and 1 represents a rose. The task is to find the maximum number of adjacent roses in geek's rosarium. For a spot (i, j) adjacent spots are (i+1, j), (i-1, j), (i, j-1), (i, j+1), (i-1, j-1), (i-1, j+1), (i+1, j-1), and (i+1, j+1).
Input:
1. The first line of the input contains a single integer T denoting the number of test cases. The description of T test cases follows.
2. The first line of each test case contains two space-separated integers N and M.
3. Next N lines consist of M characters.
Output: For each test case, print the maximum number of adjacent roses.
Constraints:
1. 1 <= T <= 100
2. 1 <= N, M <= 100
3. '0' <= arr[i][j] <= '1'
Example:
Input:
2
2 2
10
01
3 4
1001
0011
0101
Output:
2
5
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