instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a group of small children sitting at a table in front of a pizza'. Replace the letter 'r' with 'd' in the sentence.
answer:
a gdoup of small childden sitting at a table in fdont of a pizza

question:
Sentence: 'a herd of black cattle grazing and lounging in a green field'. Replace the letter 'a' with 'q' in the sentence.
answer:
q herd of blqck cqttle grqzing qnd lounging in q green field

question:
Sentence: 'the clock face on the exterior of a building'. Replace the letter 't' with 'l' in the sentence.
answer:
lhe clock face on lhe exlerior of a building