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