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

Q: Sentence: 'a long green grain traveling past a white building'. Replace the letter 'w' with 'o' in the sentence.

A: a long green grain traveling past a ohite building
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Q: Sentence: 'people wait for a train on a snowy sidewalk'. Replace the letter 'n' with 'm' in the sentence.

A: people wait for a traim om a smowy sidewalk
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Q: Sentence: 'a wooden bench and patio in front of a garden'. Replace the letter 'b' with 'g' in the sentence.

A:
a wooden gench and patio in front of a garden
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