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