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