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