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: Salad. Sentence 1: I went home happy with my choice. Sentence 2: I sat in the drive thru, thinking about the weight I'd gained. Sentence 3: I looked at the menu and thought about all the calories. Sentence 4: I decided to have a salad instead of a burger. Sentence 5: I went to get hamburgers for dinner.
A:
15