instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a laptop computer attached to a large monitor'. Replace the letter 'a' with 'r' in the sentence.
answer:
r lrptop computer rttrched to r lrrge monitor


question:
Sentence: 'a close up of a train on train tracks at night'. Replace the letter 'n' with 'm' in the sentence.
answer:
a close up of a traim om traim tracks at might


question:
Sentence: 'cow chained into a closed in enclosure with other cows in the backgournd'. Replace the letter 'n' with 'm' in the sentence.
answer:

cow chaimed imto a closed im emclosure with other cows im the backgourmd