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

Q: Sentence: 'a train traveling through a dark tunnel next to green brush.'. Replace the letter 'r' with 'e' in the sentence.

A: a teain teaveling theough a daek tunnel next to geeen beush.
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Q: Sentence: 'a single person is working in the cluttered kitchen'. Replace the letter 'n' with 'e' in the sentence.

A: a siegle persoe is workieg ie the cluttered kitchee
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Q: Sentence: 'a fancy kitchen with an island in the middle'. Replace the letter 'm' with 'b' in the sentence.

A:
a fancy kitchen with an island in the biddle
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