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