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

Example Input: Sentence: 'a black and white photo of a bird clouds sand and water'. Replace the letter 'b' with 'p' in the sentence.
Example Output: a plack and white photo of a pird clouds sand and water

Example Input: Sentence: 'a group of people play a video game in a living room'. Replace the letter 'p' with 'u' in the sentence.
Example Output: a grouu of ueoule ulay a video game in a living room

Example Input: Sentence: 'people are seen skiing at a ski resort'. Replace the letter 'a' with 'i' in the sentence.
Example Output:
people ire seen skiing it i ski resort