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

Example Input: Sentence: 'a man in a baseball cap watching something in the air'. Replace the letter 'g' with 'o' in the sentence.
Example Output: a man in a baseball cap watchino somethino in the air

Example Input: Sentence: 'a woman is holding a bowl of green brocolli'. Replace the letter 'o' with 'w' in the sentence.
Example Output: a wwman is hwlding a bwwl wf green brwcwlli

Example Input: Sentence: 'a black and white photo of skyscrapers in the city'. Replace the letter 'n' with 'k' in the sentence.
Example Output:
a black akd white photo of skyscrapers ik the city