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