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