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: Messy Roommate. Sentence 1: Tom moved in with a new roommate. Sentence 2: After a while it caused too many arguments. Sentence 3: Unfortunately Tom realized that wasn't true. Sentence 4: The ad said that he was clean. Sentence 5: Tom decided to move out.
A:
24