instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a man that is on the back of an elephant'. Replace the letter 'c' with 'd' in the sentence.
answer:
a man that is on the badk of an elephant


question:
Sentence: 'a city street at dusk time with traffic'. Replace the letter 'i' with 'm' in the sentence.
answer:
a cmty street at dusk tmme wmth traffmc


question:
Sentence: 'a mouse sits next to a keyboard in front of a speaker'. Replace the letter 'o' with 'b' in the sentence.
answer:

a mbuse sits next tb a keybbard in frbnt bf a speaker