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