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