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