Dear friend, I'm in touch with someone who is in an unusual situation. This one lost his father several years ago. Imagine that he has just learned that his father had accumulated an impressive collection of coins. In his will, it is written that he will hand over his collection to the one of his children who will be the first to succeed in identifying the person appearing on an old coin. It's a very unusual way of bequeathing one's fortune! This son therefore sends us a drawing representing this coin, with other documents that we must resolve beforehand to demonstrate our seriousness. If we identify the person on this coin in a time that will allow this gentleman to claim the collection, he has already told me that he will give us several coins from the collection. So what do you say my friend, do we accept this challenge? Your old friend, Ben Gunn.