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