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