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