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

[EX Q]: Sentence: 'a group of people riding on top of snow boarding equipment'. Replace the letter 'e' with 'x' in the sentence.
[EX A]: a group of pxoplx riding on top of snow boarding xquipmxnt

[EX Q]: Sentence: 'a police officer on a horse is riding down the street'. Replace the letter 'h' with 'a' in the sentence.
[EX A]: a police officer on a aorse is riding down tae street

[EX Q]: Sentence: 'a white horse hocked up to a covered cart'. Replace the letter 'r' with 'a' in the sentence.
[EX A]:
a white hoase hocked up to a coveaed caat