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