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