1 1 3.
1 2 0.
1 3 1.1
1 4 0.
2 1 2.
2 2 4.
2 3 0.0
2 4 2.
3 1 0.2
3 2 2.
3 3 9.0
3 4 8.
4 1 4.2
4 2 0.
4 3 2.1
4 4 0.1