There once was a dog that had a problem with a cat. He owed him a favour. The cat told the dog to catch a fish from a person every day for 4 weeks. What the cat didn't say is that the person was very bad and could hit the dog if he discovered what the dog planned to do. One day the peron hit the dog so the next day he was in disguise. The cat was very surprised when the dog gave him a fish-and the dog was wearing glasses!