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

Example Input: Sentence: 'a formal dinning room in a stately manor'. Replace the letter 'n' with 'o' in the sentence.
Example Output: a formal diooiog room io a stately maoor

Example Input: Sentence: 'the child is throwing the frisbee through the hoop'. Replace the letter 't' with 'm' in the sentence.
Example Output: mhe child is mhrowing mhe frisbee mhrough mhe hoop

Example Input: Sentence: 'a giraffe eating next to a building'. Replace the letter 'i' with 'o' in the sentence.
Example Output:
a goraffe eatong next to a buoldong