In this task, you need to replace a letter in the sentence with another given letter.
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Question: Sentence: 'a red hydrant is sitting on the sidewalk in the city'. Replace the letter 'n' with 'r' in the sentence.

Answer: a red hydrart is sittirg or the sidewalk ir the city


Question: Sentence: 'a man who is surfing in a wave in the ocean'. Replace the letter 'a' with 'u' in the sentence.

Answer: u mun who is surfing in u wuve in the oceun


Question: Sentence: 'a fleet of small boats is moored in the water near a scattering of lobster traps markers'. Replace the letter 'r' with 'b' in the sentence.

Answer:
a fleet of small boats is moobed in the wateb neab a scattebing of lobsteb tbaps mabkebs