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