instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a herd of cattle standing on a lush green field'. Replace the letter 'g' with 'f' in the sentence.
answer:
a herd of cattle standinf on a lush freen field


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: 'a man and a woman sitting on a couch with a little boy'. Replace the letter 'c' with 'd' in the sentence.
answer:

a man and a woman sitting on a doudh with a little boy