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