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

Example Input: Sentence: 'a ski slope consisting of several people wearing skis and snowboards'. Replace the letter 'e' with 's' in the sentence.
Example Output: a ski slops consisting of ssvsral psopls wsaring skis and snowboards

Example Input: Sentence: 'a person jumping up in the air on a snowboard'. Replace the letter 'r' with 'o' in the sentence.
Example Output: a peoson jumping up in the aio on a snowboaod

Example Input: Sentence: 'a young boy in a suit and tie with a bowl haircut'. Replace the letter 'y' with 'p' in the sentence.
Example Output:
a poung bop in a suit and tie with a bowl haircut