instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a memorial with various plaques and american flags on it'. Replace the letter 'a' with 'k' in the sentence.
answer:
k memorikl with vkrious plkques knd kmerickn flkgs on it

question:
Sentence: 'a male holding a baseball bat standing on a big white star'. Replace the letter 'a' with 'i' in the sentence.
answer:
i mile holding i bisebill bit stinding on i big white stir

question:
Sentence: 'a display rack in a bakery store with pies and cakes'. Replace the letter 'n' with 'v' in the sentence.
answer:
a display rack iv a bakery store with pies avd cakes