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