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