Instructions: 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.
Input: Title: The test. Sentence 1: She was concerned about her grade. Sentence 2: She hadn't prepared much for the test. Sentence 3: Lacy was scared. Sentence 4: She took the test. Sentence 5: She found out she passed the test.
Output:
31