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