instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'busy city street with pedestrians and cars with lights all around'. Replace the letter 'r' with 'k' in the sentence.
answer:
busy city stkeet with pedestkians and caks with lights all akound


question:
Sentence: 'the child is throwing the frisbee through the hoop'. Replace the letter 't' with 'm' in the sentence.
answer:
mhe child is mhrowing mhe frisbee mhrough mhe hoop


question:
Sentence: 'polar bear sitting on a rocky surface, looking at something'. Replace the letter 'i' with 'b' in the sentence.
answer:

polar bear sbttbng on a rocky surface, lookbng at somethbng