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

Q: Sentence: 'a small bird perched on a open window'. Replace the letter 'e' with 'r' in the sentence.

A: a small bird prrchrd on a oprn window
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Q: Sentence: 'broccoli and a sweet potato are served on a white plate'. Replace the letter 'o' with 'c' in the sentence.

A: brccccli and a sweet pctatc are served cn a white plate
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Q: Sentence: 'a boy feeding a cow through a fence'. Replace the letter 'a' with 'g' in the sentence.

A:
g boy feeding g cow through g fence
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