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: Thunderstorm. Sentence 1: We could see the clouds rolling in nearby. Sentence 2: Seconds later, the ground shook. Sentence 3: A huge lightning bolt came from one of the clouds down to the ground. Sentence 4: As they got closer, they also got darker looking. Sentence 5: Everyone nearby took cover from the incoming storm.
A:
24