Direction: In this question, the first and last sentences of the passage are numbered 1 and 6. The rest of passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence and find out which of the four combinations is correct.

S1: The dictionary is the best friend of your task.

P: That may not be possible always.

Q: It is wise to look it up immediately.

R: Then it must be firmly written on the memory and traced at the first opportunity.

S: Never allow a strange word to pass unchallenged.

S6: Soon you will realize that this is an exciting task.

The Proper sequence should be: