instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'people are standing outside in the parking lot'. Replace the letter 'i' with 'z' in the sentence.
answer:
people are standzng outszde zn the parkzng lot


question:
Sentence: 'a house cat sits on an oven door, sniffing the oven racks inside'. Replace the letter 'i' with 'y' in the sentence.
answer:
a house cat syts on an oven door, snyffyng the oven racks ynsyde


question:
Sentence: 'venus williams playing tennis on a grass field'. Replace the letter 's' with 'c' in the sentence.
answer:

venuc williamc playing tennic on a gracc field