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

Example Input: Sentence: 'a teddy bear dressed in denim is laying on a floor'. Replace the letter 'i' with 'd' in the sentence.
Example Output: a teddy bear dressed dn dendm ds laydng on a floor

Example Input: Sentence: 'a man that is holding a remote to a game'. Replace the letter 'a' with 'z' in the sentence.
Example Output: z mzn thzt is holding z remote to z gzme

Example Input: Sentence: 'a small blue and yellow airplane flying through the air'. Replace the letter 'g' with 'v' in the sentence.
Example Output:
a small blue and yellow airplane flyinv throuvh the air