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