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