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