In this task, you need to replace a letter in the sentence with another given letter.
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Question: Sentence: 'a girl sitting in a chair eating a slice of pizza'. Replace the letter 'i' with 'x' in the sentence.

Answer: a gxrl sxttxng xn a chaxr eatxng a slxce of pxzza


Question: Sentence: 'some tracks for a rail way system near a building'. Replace the letter 'a' with 'h' in the sentence.

Answer: some trhcks for h rhil why system nehr h building


Question: Sentence: 'a person is petting a small dog with a frisbee in it's mouth'. Replace the letter 'g' with 'f' in the sentence.

Answer:
a person is pettinf a small dof with a frisbee in it's mouth