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