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