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