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