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