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