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