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: 'view from across the street and view from rear view mirror'. Replace the letter 'v' with 't' in the sentence.
Example Output: tiew from across the street and tiew from rear tiew mirror

Example Input: Sentence: 'a woman holding a tennis racket getting ready to hit a tennis ball'. Replace the letter 'r' with 'l' in the sentence.
Example Output:
a woman holding a tennis lacket getting leady to hit a tennis ball