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