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

Example Input: Sentence: 'kites flying over a woman wearing a hat'. Replace the letter 'i' with 'j' in the sentence.
Example Output: kjtes flyjng over a woman wearjng a hat

Example Input: Sentence: 'a man is standing on a snowboard, atop a mountain'. Replace the letter 'd' with 'u' in the sentence.
Example Output: a man is stanuing on a snowboaru, atop a mountain

Example Input: Sentence: 'the parking lot is full of cars and some people walk their dog nearby'. Replace the letter 'l' with 'a' in the sentence.
Example Output:
the parking aot is fuaa of cars and some peopae waak their dog nearby