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: The Rude Coworker. Sentence 1: She liked it a lot except for one mean coworker. Sentence 2: Hannah had recently started a new job. Sentence 3: The woman would always make snide and passive aggressive comments. Sentence 4: Hannah decided to mention this to one of her friendlier coworkers. Sentence 5: Luckily, the woman had some great advice and Hannah felt confident.
A:
21