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

Q: Sentence: 'a building has a clock on the top of it'. Replace the letter 'l' with 'x' in the sentence.

A: a buixding has a cxock on the top of it
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Q: Sentence: 'a large elephant that has people all around it'. Replace the letter 'h' with 'm' in the sentence.

A: a large elepmant tmat mas people all around it
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Q: Sentence: 'a black and red train stands near some tall trees'. Replace the letter 'd' with 's' in the sentence.

A:
a black ans res train stanss near some tall trees
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