instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a open entrance leading to a set of closed doors'. Replace the letter 'd' with 'f' in the sentence.
answer:
a open entrance leafing to a set of closef foors


question:
Sentence: 'a red stop sign sitting on the side of a road'. Replace the letter 'r' with 'o' in the sentence.
answer:
a oed stop sign sitting on the side of a ooad


question:
Sentence: 'a baseball player in mid swing and a catcher ready with his glove'. Replace the letter 't' with 'n' in the sentence.
answer:

a baseball player in mid swing and a cancher ready winh his glove