In this task, you need to replace a letter in the sentence with another given letter.
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Question: Sentence: 'a group of people walking along a dirty snow covered road'. Replace the letter 'n' with 'i' in the sentence.

Answer: a group of people walkiig aloig a dirty siow covered road


Question: Sentence: 'a bathroom that has  a sink and a toilet'. Replace the letter 's' with 'a' in the sentence.

Answer: a bathroom that haa  a aink and a toilet


Question: Sentence: 'a pedestrian crossing sign sitting underneath a street sign'. Replace the letter 'e' with 'v' in the sentence.

Answer:
a pvdvstrian crossing sign sitting undvrnvath a strvvt sign