instruction:
In this task, you need to replace a letter in the sentence with another given letter.
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 little girl is sitting in a suitcase in a library'. Replace the letter 't' with 'l' in the sentence.
answer:
a lillle girl is silling in a suilcase in a library


question:
Sentence: 'a close up image of a large clock face'. Replace the letter 'o' with 's' in the sentence.
answer:

a clsse up image sf a large clsck face