In this task, you need to replace a letter in the sentence with another given letter.
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Question: Sentence: 'a guy looking at a tennis ball with a goofy look'. Replace the letter 'a' with 'x' in the sentence.

Answer: x guy looking xt x tennis bxll with x goofy look


Question: Sentence: 'a dog laying in front of a horses stall with the horse peeking over the half door'. Replace the letter 'a' with 'b' in the sentence.

Answer: b dog lbying in front of b horses stbll with the horse peeking over the hblf door


Question: Sentence: 'an assortment of donuts are displayed in a bakery case'. Replace the letter 's' with 'w' in the sentence.

Answer:
an awwortment of donutw are diwplayed in a bakery cawe