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

[Q]: Sentence: 'a crowd stands under a set of lights in the ceiling and one person holds up a cell phone'. Replace the letter 'r' with 'f' in the sentence.
[A]: a cfowd stands undef a set of lights in the ceiling and one pefson holds up a cell phone


[Q]: Sentence: 'a horse in a country field with woods in the background'. Replace the letter 'a' with 'i' in the sentence.
[A]: i horse in i country field with woods in the bickground


[Q]: Sentence: 'a short train traveling closer on train tracks'. Replace the letter 'n' with 'a' in the sentence.
[A]:
a short traia traveliag closer oa traia tracks