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: Test. Sentence 1: Joe was relieved. Sentence 2: He is very anxious about it. Sentence 3: He stayed up all night studying. Sentence 4: When he got to class, his teacher canceled the test. Sentence 5: Joe has a big English test.
15