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