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