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