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