instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'an old rusty car sits outside of an old building'. Replace the letter 'o' with 'r' in the sentence.
answer:
an rld rusty car sits rutside rf an rld building


question:
Sentence: 'a room with a bed, lamps, tables and pillows'. Replace the letter 's' with 'b' in the sentence.
answer:
a room with a bed, lampb, tableb and pillowb


question:
Sentence: 'two men are standing next to a motorcycle'. Replace the letter 'n' with 'm' in the sentence.
answer:

two mem are stamdimg mext to a motorcycle