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: Car Repair Crisis. Sentence 1: Mel lived paycheck to paycheck and money was always tight. Sentence 2: He paid his monthly bills on time but had very little cash left over. Sentence 3: One fateful month, he was forced to take his car to the mechanic's. Sentence 4: Given Mel's situation, the mechanic agreed to work out a payment plan. Sentence 5: Mel panicked when he learned the car needed a new transmission.
A:
54