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