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@Will Jagy Hi, Will. I have been "a victim" (an exaggerated term!) of this cheating, although I detected something abnormal that I noticed and wrote explicitly: this guy had previously posted the problem and, less that 5 minutes later, erased it, then reposted it 12 hours later. In a retrospective thought, I should have refrained from answering...
Why downvoting such a question ? For me it's a typical lack of tolerance one finds so often on the Internet. All sensible opinions have the right to be expressed, and arguing about them is good. I think that a criteria @José Carlos Santos has given "a question you can have the answer just by googling (in the case query formulation is easy)" is a really good separation line.
