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

[EX Q]: Sentence: 'a tower type building structure with a large clock and many windows in front of a cloudy blue sky'. Replace the letter 'n' with 'x' in the sentence.
[EX A]: a tower type buildixg structure with a large clock axd maxy wixdows ix froxt of a cloudy blue sky

[EX Q]: Sentence: 'a geoup of people on bicycles coming down a street'. Replace the letter 'i' with 'x' in the sentence.
[EX A]: a geoup of people on bxcycles comxng down a street

[EX Q]: Sentence: 'two slices of pizza on a white plate'. Replace the letter 'z' with 'p' in the sentence.
[EX A]:
two slices of pippa on a white plate