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