Q: 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.
Title: Going to a Concert. Sentence 1: I was completely exhausted when I got home that night. Sentence 2: I made sure to buy tickets to see them ahead of time. Sentence 3: I waited in line for an hour before I got in the venue. Sentence 4: While they played, I yelled until I nearly hoarse. Sentence 5: One of my favorite bands came to my city.
A:
15