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