S1: My office sent a message with a terrific urgency asking me to return. P: I immediately sent a message requesting a few days of grace as I had to book the return ticket and attend sundry matters before winding up my establishment here. Q: On the way, I went to the laundry and made sure I would get my clothes in time. R: Then I rushed to the bank, collected all my money and made reservations for my return journey. S: From the shop next to it, I bought a strong box to dump my books and other odd articles so that I could send them away in advance. S6: It was the evening before I could sit and write to my parents that I would join them soon. Find the correct sequence of P, Q, R and S.