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