1  4  0.8
2  3  1.0
2  5  3
2  7  2.5
2  8  1.3
2  10 2.2
3  9  2.3
5  6  2.8
6  5  1.2
6  9  0.3
7  2  1.1
8  1  2.6
9  8  2.1
10 7  0.9