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: Swimming in the Rain. Sentence 1: Tom was going to go to the lake with friends. Sentence 2: They planned to go swimming. Sentence 3: It started to rain. Sentence 4: It was a very pleasant experience. Sentence 5: They decided to go anyway.
Output:
45