20
18 12 13 15 16 14 19 17 11 20 
12 19 16 18 11 20 13 17 15 14 
12 17 20 16 18 13 11 14 19 15 
15 12 17 18 20 14 13 11 16 19 
16 11 13 14 12 18 17 19 15 20 
12 14 15 16 11 13 20 18 17 19 
11 13 19 16 14 17 12 18 15 20 
16 15 14 11 13 19 12 18 20 17 
12 17 15 13 11 20 19 14 16 18 
12 20 15 14 18 16 17 11 13 19 
5 2 4 3 7 1 10 9 6 8 
3 6 1 2 5 4 9 7 10 8 
2 9 1 3 6 10 8 5 4 7 
3 1 10 9 5 2 6 7 8 4 
2 9 5 6 1 7 10 4 3 8 
7 1 4 5 2 8 6 10 9 3 
4 9 3 2 6 5 7 1 8 10 
5 8 9 1 2 4 7 3 10 6 
3 9 7 1 10 2 6 4 5 8 
6 9 5 10 8 4 1 2 7 3 
forbidden 1 11
forbidden 1 12
forbidden 1 13
forbidden 1 14
forbidden 1 18
forbidden 2 17
forbidden 2 18
forbidden 3 13
forbidden 3 14
forbidden 3 17
forbidden 3 19
forbidden 3 20
forbidden 4 13
forbidden 4 14
forbidden 4 16
forbidden 4 17
forbidden 4 20
forbidden 5 11
forbidden 5 18
forbidden 5 20
forbidden 6 12
forbidden 6 16
forbidden 6 19
forbidden 7 12
forbidden 7 14
forbidden 7 15
forbidden 7 19
forbidden 8 12
forbidden 8 14
forbidden 8 17
forbidden 8 18
forbidden 8 20
forbidden 9 14
forbidden 10 11
forbidden 10 13
forbidden 10 14
forbidden 10 15
forbidden 10 16
forbidden 10 17
forbidden 10 19