In this task, you need to replace a letter in the sentence with another given letter.
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Question: Sentence: 'a person on a snow board flying through the air'. Replace the letter 'f' with 'n' in the sentence.

Answer: a person on a snow board nlying through the air


Question: Sentence: 'a man dressed in a knight costume riding a horse performing at a show'. Replace the letter 'e' with 'j' in the sentence.

Answer: a man drjssjd in a knight costumj riding a horsj pjrforming at a show


Question: Sentence: 'several elephants crossing through a small river in the woods'. Replace the letter 'a' with 'r' in the sentence.

Answer:
severrl elephrnts crossing through r smrll river in the woods