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