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