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