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