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