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