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