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