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