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