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