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