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