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.
Input: Title: Dogs versus Burglars. Sentence 1: Soon he found his dog attacking a would-be burglar. Sentence 2: He went to investigate as he heard the sounds escalate. Sentence 3: Harry was in bed when he heard his dogs growling. Sentence 4: Harry joined the attack and subdued the man. Sentence 5: He called the authorities and luckily the man was arrested.
Output:
31