An uncertain number of persons are sitting in a straight line facing north. Three persons sit between P and Q. R sits second to the right of P. Only three people sit between Q and S. T is immediate to the left of P. R sits fifth from the right extreme ends of the row. X sits on the extreme end of the row. As many people sit between R and U as many between U and S. Y sits second to the left of V, who is an immediate neighbor of Q. Not more than two persons sit between V and S. Five people sit between S and X. As many people sit between S and W as many between W and X.