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 memorial with various plaques and american flags on it'. Replace the letter 'a' with 'k' in the sentence.
[A]: k memorikl with vkrious plkques knd kmerickn flkgs on it


[Q]: Sentence: 'this is an image of cooked and raw apples'. Replace the letter 'a' with 's' in the sentence.
[A]:
this is sn imsge of cooked snd rsw spples