Read this story and guess why the man always gets out at the ninth floor (i don't know the answer)
A lazy, forgetful young man lives on the 13th floor of a tall building. In the morning, he gets in the lift down to the ground floor, goes out of the building and drives to work. When he returns he goes to the 9th floor and then walks the other four floors up to his flat. Occasionally he returns all the way to the 13th floor in the lift. But only when it's raining, and he remembers his umbrella!
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