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

Example Input: Sentence: 'a plate of food which contain smothered meat, potatoes and broccoli'. Replace the letter 'p' with 'v' in the sentence.
Example Output: a vlate of food which contain smothered meat, votatoes and broccoli

Example Input: Sentence: 'a close shot of a stop sign near a building'. Replace the letter 'b' with 'u' in the sentence.
Example Output: a close shot of a stop sign near a uuilding

Example Input: Sentence: 'a family sitting around a table with a meal of pizza'. Replace the letter 'h' with 'z' in the sentence.
Example Output:
a family sitting around a table witz a meal of pizza