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