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