In this task, you need to replace a letter in the sentence with another given letter.

[EX Q]: Sentence: 'a guy looking at a tennis ball with a goofy look'. Replace the letter 'a' with 'x' in the sentence.
[EX A]: x guy looking xt x tennis bxll with x goofy look

[EX Q]: Sentence: 'a giraffe standing alone with a low fence behind it'. Replace the letter 't' with 'o' in the sentence.
[EX A]: a giraffe soanding alone wioh a low fence behind io

[EX Q]: Sentence: 'four zebras drinking water with field in the background'. Replace the letter 'k' with 'p' in the sentence.
[EX A]:
four zebras drinping water with field in the bacpground