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