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