在文件里面有n行数，每行不知道多少个，独处文件中的数，在求出最大公约数。-Within the files have n rows, each line don t know how many alone, the number of documents, the largest companies in the o.

Input question formats:

The first line a number N, says there are a N matrix

Each matrix after first by the two digital m, n, said the matrix is m* n matrix

Back row number is a n, m line