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