Definition: 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: Fire. Sentence 1: While taking a walk David noticed a house fire. Sentence 2: David rushed into the house looking for the third resident, Kay. Sentence 3: He only saw two of the three residents outside. Sentence 4: David knew the people that lived there. Sentence 5: David was able to pull Kay out of the burning house.
Output:
24