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