instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a woman walks by with a large suitcase and a polka dot umbrella'. Replace the letter 'e' with 'n' in the sentence.
answer:
a woman walks by with a largn suitcasn and a polka dot umbrnlla


question:
Sentence: 'a man on a surfboard riding on the waters waves'. Replace the letter 's' with 'k' in the sentence.
answer:
a man on a kurfboard riding on the waterk wavek


question:
Sentence: 'three giraffes four geese in a feeding enclosure'. Replace the letter 'e' with 'u' in the sentence.
answer:

thruu giraffus four guusu in a fuuding unclosuru