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: The Tough Hike. Sentence 1: James and a couple friends wanted to climb a large mountain. Sentence 2: They trained for a few months by hiking up hills in their city. Sentence 3: At the end of the day, they finally made it to the top! Sentence 4: They hiked all day, sweating as they climbed. Sentence 5: The day of the mountain climb finally arrived.
Output:
53