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