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