In this task, you need to replace a letter in the sentence with another given letter.
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Question: Sentence: 'a person under an open umbrella in the sand'. Replace the letter 'd' with 'h' in the sentence.

Answer: a person unher an open umbrella in the sanh


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 person setting on a bench on a sidewalk holding an umbrella watching a building'. Replace the letter 'a' with 'n' in the sentence.

Answer:
n person setting on n bench on n sidewnlk holding nn umbrelln wntching n building