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

Input: Consider Input: Sentence: 'a house cat sits on an oven door, sniffing the oven racks inside'. Replace the letter 'i' with 'y' in the sentence.

Output: a house cat syts on an oven door, snyffyng the oven racks ynsyde

Input: Consider Input: Sentence: 'a big bowl of brown food halfway in a small oven'. Replace the letter 'v' with 'k' in the sentence.

Output: a big bowl of brown food halfway in a small oken

Input: Consider Input: Sentence: 'a lady taking a picture of a red bus'. Replace the letter 'y' with 'p' in the sentence.
Output: a ladp taking a picture of a red bus