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