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