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