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