instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a computer, keyboard, and mouse sitting on a desk'. Replace the letter 's' with 'c' in the sentence.
answer:
a computer, keyboard, and mouce citting on a deck

question:
Sentence: 'the big sandwich features several different colorful ingredients'. Replace the letter 'e' with 'o' in the sentence.
answer:
tho big sandwich foaturos sovoral difforont colorful ingrodionts

question:
Sentence: 'stop lights hanging on lines during a purple sky night'. Replace the letter 'i' with 'b' in the sentence.
answer:
stop lbghts hangbng on lbnes durbng a purple sky nbght