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