S₁: The train was running fast and the next station was nearly an hour ahead. S₆: Their aunt was occupying a corner seat. P: The children were pestering their aunt with embarrassing questions. Q: The occupants of the first carriage among others were a tall girl, a little girl and a little boy. R: Luckily an ice cream vendor came to the rescue of the aunt. S: She bought four cups of ice cream and all of them became busy with eating. The proper sequence should be