instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a group of giraffe standing on top of a dirt field'. Replace the letter 'a' with 'y' in the sentence.
answer:
y group of giryffe stynding on top of y dirt field


question:
Sentence: 'closeup of two teddy bears in red scarves and a brown teddy bear'. Replace the letter 'i' with 'y' in the sentence.
answer:
closeup of two teddy bears yn red scarves and a brown teddy bear


question:
Sentence: 'a man standing up in front of doors with a folder in his hands'. Replace the letter 'e' with 'u' in the sentence.
answer:

a man standing up in front of doors with a foldur in his hands