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