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