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

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 man stands in front of a plane on a take off strip'. Replace the letter 'n' with 'o' in the sentence.
Example Output: a mao staods io froot of a plaoe oo a take off strip

Example Input: Sentence: 'here is a beautiful old steeple in the late afternoon sun'. Replace the letter 'l' with 'o' in the sentence.
Example Output:
here is a beautifuo ood steepoe in the oate afternoon sun