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