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