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

Example Input: Sentence: 'a cat with a pink bow sits underneath something silver'. Replace the letter 'h' with 'n' in the sentence.
Example Output: a cat witn a pink bow sits underneatn sometning silver

Example Input: Sentence: 'a man swinging at a tennis with a racquet on a court'. Replace the letter 't' with 'c' in the sentence.
Example Output: a man swinging ac a cennis wich a racquec on a courc

Example Input: Sentence: 'a desert on a plate on a table next to a glass'. Replace the letter 'e' with 'v' in the sentence.
Example Output:
a dvsvrt on a platv on a tablv nvxt to a glass