instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a living room with an orange couch and green decorations'. Replace the letter 'c' with 'm' in the sentence.
answer:
a living room with an orange moumh and green demorations

question:
Sentence: 'a woman is talking on her white phone'. Replace the letter 'w' with 'r' in the sentence.
answer:
a roman is talking on her rhite phone

question:
Sentence: 'a person riding skis down a hill on a course'. Replace the letter 'n' with 'r' in the sentence.
answer:
a persor ridirg skis dowr a hill or a course