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

Example Input: Sentence: 'a kitchen scene with a lot of items on the counters'. Replace the letter 't' with 'm' in the sentence.
Example Output: a kimchen scene wimh a lom of imems on mhe counmers

Example Input: Sentence: 'a police officer on a horse is riding down the street'. Replace the letter 'h' with 'a' in the sentence.
Example Output: a police officer on a aorse is riding down tae street

Example Input: Sentence: 'the man sitting near colorful flowers is using his cell phone'. Replace the letter 'i' with 'o' in the sentence.
Example Output:
the man sottong near colorful flowers os usong hos cell phone

