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