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

[EX Q]: Sentence: 'a chinese entree displayed on a red plate'. Replace the letter 'n' with 'z' in the sentence.
[EX A]: a chizese eztree displayed oz a red plate

[EX Q]: Sentence: 'a lonley giraffe is making a trek in the wild'. Replace the letter 'r' with 'h' in the sentence.
[EX A]: a lonley gihaffe is making a thek in the wild

[EX Q]: Sentence: 'a happy cowboy sits atop a horse in a city parade'. Replace the letter 'a' with 'z' in the sentence.
[EX A]:
z hzppy cowboy sits ztop z horse in z city pzrzde