The following six sentences come from a paragraph. The first and the last sentences are given. Choose the order in which the four sentences (PQRS) should appear to complete the paragraph.
S1. Your letter was a big relief.
P. How did your exams go?
Q. After your result, you must come here for a week.
R. You hadn't written for over a month.
S. I am sure you will come out with flying colors.
S6. But don't forget to bring chocolates for Geeta.