In this task, you need to replace a letter in the sentence with another given letter.
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Question: Sentence: 'a person holding a green cell phone in a classroom with many desks'. Replace the letter 'k' with 'w' in the sentence.

Answer: a person holding a green cell phone in a classroom with many desws


Question: Sentence: 'a laptop computer attached to a large monitor'. Replace the letter 'a' with 'r' in the sentence.

Answer: r lrptop computer rttrched to r lrrge monitor


Question: Sentence: 'a group of people getting on a red train'. Replace the letter 'd' with 'm' in the sentence.

Answer:
a group of people getting on a rem train