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