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