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