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