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

Example Input: Sentence: 'a toilet in a bathroom with small white tile on the floor'. Replace the letter 'a' with 'p' in the sentence.
Example Output: p toilet in p bpthroom with smpll white tile on the floor

Example Input: Sentence: 'a herd of zebra grazing in a lush green field'. Replace the letter 'h' with 'j' in the sentence.
Example Output: a jerd of zebra grazing in a lusj green field

Example Input: Sentence: 'large clock mounted to a living room wall'. Replace the letter 'a' with 'd' in the sentence.
Example Output:
ldrge clock mounted to d living room wdll