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