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