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