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