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