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

Example Input: Sentence: 'a person on a snowboard does an air trick'. Replace the letter 'n' with 'o' in the sentence.
Example Output: a persoo oo a soowboard does ao air trick

Example Input: Sentence: 'a woman in blue jacket shaving a cows utters'. Replace the letter 'h' with 'q' in the sentence.
Example Output: a woman in blue jacket sqaving a cows utters

Example Input: Sentence: 'a group of people are flying rainbow kites in a field'. Replace the letter 'f' with 'q' in the sentence.
Example Output:
a group oq people are qlying rainbow kites in a qield