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: 'a white plate topped with meat and greens'. Replace the letter 's' with 'b' in the sentence.
answer:
a white plate topped with meat and greenb


question:
Sentence: 'a polar bear cub sleeping note the stomach of an adult polar bear'. Replace the letter 's' with 'c' in the sentence.
answer:

a polar bear cub cleeping note the ctomach of an adult polar bear