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