Detailed Instructions: In this task, you're given the title of a story consisting of five sentences, numbered 1 through 5. Your job is to determine which two sentences need to be swapped sentences in order to make a story that makes complete sense and is befittingly titled. Indicate your answer using the numbers of the two sentences in order, such as '34' or '25'. The first digit refers to the sentence which should come first in the story.
Q: Title: Gift. Sentence 1: I worked for the MBTA, a mass transit authority. Sentence 2: I retired from my job in September of 2012. Sentence 3: I was a trolley and subway car fan. Sentence 4: Last week an ex coworker sent me a marketing item issued by the MBTA. Sentence 5: I emailed her my thanks.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
12