In this task, you need to replace a letter in the sentence with another given letter.
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Question: Sentence: 'a blue and white train is coming down some tracks'. Replace the letter 'b' with 'u' in the sentence.

Answer: a ulue and white train is coming down some tracks


Question: Sentence: 'a dog drinking out of a bowl of water'. Replace the letter 'w' with 'k' in the sentence.

Answer: a dog drinking out of a bokl of kater


Question: Sentence: 'an arm laying on the ground with a cell phone in the hand'. Replace the letter 'w' with 'x' in the sentence.

Answer:
an arm laying on the ground xith a cell phone in the hand