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