TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'two zebras are snuggling at the zoo in their display area'. Replace the letter 'e' with 'z' in the sentence.

SOLUTION: two zzbras arz snuggling at thz zoo in thzir display arza

PROBLEM: Sentence: 'a street side tree is filled with candles, teddy bears and balloons'. Replace the letter 'e' with 'c' in the sentence.

SOLUTION: a strcct sidc trcc is fillcd with candlcs, tcddy bcars and balloons

PROBLEM: Sentence: 'a woman in white shirt opening a refrigerator with sink in background'. Replace the letter 'r' with 'c' in the sentence.

SOLUTION:
a woman in white shict opening a cefcigecatoc with sink in backgcound