4 7  matrix 1
1 2 3 4 5 6 7
3 1 3 1 3 1 3
2 1 0 -1 -2 -3 5
2 4 5 1 9 3 6
4 7  matrix 2
1 2 1 2 1 2 3
-2 -1 0 -2 -1 0 5
3 -2 1 0 1 -2 3
7 6 5 4 3 2 1