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