instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a couple giraffes walking through a fielded area'. Replace the letter 'e' with 'c' in the sentence.
answer:
a couplc giraffcs walking through a ficldcd arca

question:
Sentence: 'the dog lies inside a purple and white collapsable chair'. Replace the letter 'n' with 'j' in the sentence.
answer:
the dog lies ijside a purple ajd white collapsable chair

question:
Sentence: 'a red trolley car is riding down the street next to trees in the middle of autumn'. Replace the letter 'r' with 'o' in the sentence.
answer:
a oed toolley cao is oiding down the stoeet next to toees in the middle of autumn