Arrange the sentences P, Q, R and S in the correct order to form a meaningful paragraph.

P: Within a month, they were filling every seat in the room each evening.
Q: Last year, the panchayat of a small village turned an unused storeroom into a reading room.
R: Seeing the crowded room, the panchayat added two more tables and a shelf of exam guides.
S: Students who had no quiet place to study at home began to come there after college.