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