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