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