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