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