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 tennis player throwing a ball at the ground'. Replace the letter 'r' with 'f' in the sentence.

A: a tennis playef thfowing a ball at the gfound
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Q: Sentence: 'a woman and a dog on a bike on the street'. Replace the letter 'o' with 't' in the sentence.

A:
a wtman and a dtg tn a bike tn the street
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