In the following question, there are six sentences marked S1, S6, P, Q, R and S. The position  of S1 and S6 are fixed. Choose one of the four options given below which would be the most logical sequence of the sentences in the passage. S1. I searched for my friend all day. P. Although I was wary and hungry, I was not discouraged. Q. I crept in and lay on the ground with my bag for a pillow. R. When midnight came, I felt that I could not walk further. S. At last, I reached a place where the pavement was raised and had a hollow underneath. S6. When I woke up, the Sun was already over the horizon.