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One day a rich man met Sam on the road. He said, "I _______ you are very _______. Nothing is _______ to you. Can you tell me why you are so clever?" Sam said that he was not clever, but the rich man was very _________. The rich man was very __________. Then Sam asked the rich man a question. "If you have a group of _______, and I give you ___________ group. How many groups do you have?" The rich man thought the question was very ________.He answered he had two. But his answer was ________. Two groups of sheep put _________is still one group.