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

Q: Sentence: 'a woman is standing on a street curb'. Replace the letter 'a' with 't' in the sentence.

A: t womtn is sttnding on t street curb
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Q: Sentence: 'a herd of zebra stand together and eat grass'. Replace the letter 'n' with 'r' in the sentence.

A: a herd of zebra stard together ard eat grass
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Q: Sentence: 'a suitcase is sitting on a sidewalk near trees'. Replace the letter 's' with 'd' in the sentence.

A:
a duitcade id ditting on a didewalk near treed
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