instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a person with a cell phone standing next to a train'. Replace the letter 's' with 't' in the sentence.
answer:
a perton with a cell phone ttanding next to a train


question:
Sentence: 'a long green grain traveling past a white building'. Replace the letter 'w' with 'o' in the sentence.
answer:
a long green grain traveling past a ohite building


question:
Sentence: 'the living room has an old time stove and a wooden floor'. Replace the letter 'o' with 'p' in the sentence.
answer:

the living rppm has an pld time stpve and a wppden flppr