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

Example Input: Sentence: 'a close up of a bathroom sink with soap and tooth brushes in a cup'. Replace the letter 't' with 'y' in the sentence.
Example Output: a close up of a bayhroom sink wiyh soap and yooyh brushes in a cup

Example Input: Sentence: 'a small plastic dish with food in it'. Replace the letter 'p' with 'g' in the sentence.
Example Output: a small glastic dish with food in it

Example Input: Sentence: 'a man sitting in a chair with a laptop in his lap'. Replace the letter 'p' with 'v' in the sentence.
Example Output:
a man sitting in a chair with a lavtov in his lav