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: 'two giraffe standing in an enclosure at the zoo next to a  tree'. Replace the letter 'n' with 'g' in the sentence.
answer:
two giraffe stagdigg ig ag egclosure at the zoo gext to a  tree


question:
Sentence: 'a black bear in a field of wild flowers'. Replace the letter 'e' with 'm' in the sentence.
answer:

a black bmar in a fimld of wild flowmrs