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