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