In this task, you need to replace a letter in the sentence with another given letter.

Input: Consider Input: Sentence: 'a motorcycle sitting on the side of the road by grass'. Replace the letter 'r' with 't' in the sentence.

Output: a mototcycle sitting on the side of the toad by gtass

Input: Consider Input: Sentence: 'a woman is talking on her white phone'. Replace the letter 'w' with 'r' in the sentence.

Output: a roman is talking on her rhite phone

Input: Consider Input: Sentence: 'a close up of a tennis player swinging a tennis racket'. Replace the letter 'f' with 's' in the sentence.
Output: a close up os a tennis player swinging a tennis racket