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