20 9
0.066625 0.703910
0.067799 0.538406
0.088184 0.490503
0.280652 0.104457
0.810760 0.115643
0.924842 0.398381
0.720361 0.938830
0.682674 0.953955
0.275170 0.926868
48
1 2
1 10
1 9
2 3
2 10
3 4
3 11
3 13
3 14
3 10
4 11
4 5
4 16
4 12
5 20
5 17
5 16
5 6
6 7
6 20
7 18
7 20
7 8
8 9
8 14
8 15
8 18
9 10
9 14
10 14
11 12
11 13
12 16
12 17
12 13
13 17
13 15
13 14
14 15
15 17
15 19
15 18
16 17
17 20
17 19
18 19
18 20
19 20