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