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