Stacy, Nick, Lucy, Donald, Oscar, Maria and Elliot are sitting in a straight line facing north. Each one of them lives on different floors numbered one to seven.
Stacy sits fourth to the left of the person living on the 1st floor. Either Stacy or person living on the 1st floor sits at the extreme ends of the line. Only one person sits between Donald and Stacy. Donald lives on the fourth floor. The person living on the second floor sits third to the right of Lucy. Lucy is not an immediate neighbor of Donald. Lucy is living on the third floor. Only one person live between the floors where Maria lives and the person who lived on the second floor. Oscar and Elliot are the immediate neighbors of each other. Elliot does not live on the bottom most floor. One who lives on the topmost floor sits third to the right of the one who lives on the one below it.
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