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