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

Q: Sentence: 'a man walking a horse on a dirt track'. Replace the letter 't' with 's' in the sentence.

A: a man walking a horse on a dirs srack
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Q: Sentence: 'a basket holds flowers, twigs, and various fruits'. Replace the letter 'a' with 'g' in the sentence.

A: g bgsket holds flowers, twigs, gnd vgrious fruits
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Q: Sentence: 'a cable car is going through a city on its tracks'. Replace the letter 'g' with 'a' in the sentence.

A:
a cable car is aoina throuah a city on its tracks
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