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