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