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