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: Jack Gains Weight. Sentence 1: Jack cancelled his gym membership to save money. Sentence 2: He hopes to stay in shape by running outside. Sentence 3: He regrets cancelling his gym membership. Sentence 4: Jack begins to gain weight. Sentence 5: However, he finds that without a gym membership he rarely exercises.
Output:
35