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