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: Smart. Sentence 1: Matt thought he was smarter than any of the other students. Sentence 2: Everyone in the class thought he would be able to solve it right away. Sentence 3: He decided to take on a very difficult programming exercise. Sentence 4: After two nights he realized he had no idea what he was doing. Sentence 5: Matt dropped the class rather than admit to failure.
A:
23