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