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