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