Detailed 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.
Q: Title: Kelly's Fall. Sentence 1: Kelly's favorite activity was horseback riding. Sentence 2: Kelly suffered a broken arm, but knew it could have been a lot worse. Sentence 3: One afternoon, Brownie got spooked and threw Kelly to the ground. Sentence 4: Every chance she got, she rode her horse Brownie. Sentence 5: Recovery took months, but afterwards she got right back on her horse.
A:
24