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

Q: Sentence: 'a person is looking out of a large window'. Replace the letter 'o' with 'p' in the sentence.

A: a perspn is lppking put pf a large windpw
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Q: Sentence: 'a couple walking down a sidewalk next to some graffiti'. Replace the letter 'a' with 'y' in the sentence.

A: y couple wylking down y sidewylk next to some gryffiti
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Q: Sentence: 'a bird perched in a green leaf filled tree'. Replace the letter 'a' with 'b' in the sentence.

A:
b bird perched in b green lebf filled tree
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