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.

Ex Input:
Title: Still hungry. Sentence 1: It was nearing midnight. Sentence 2: Allie was still hungry. Sentence 3: There was one slice of pizza left. Sentence 4: She went upstairs. Sentence 5: So she had some.

Ex Output:
43

Ex Input:
Title: Experimental Sound. Sentence 1: It got surprisingly popular online. Sentence 2: He tried to make some music out of it. Sentence 3: Tim was really into weird sounds. Sentence 4: After a while Tim was able to make a living off of it. Sentence 5: He even had some concerts.

Ex Output:
13

Ex Input:
Title: The Pond. Sentence 1: The couple built a house in the country. Sentence 2: It was on a peaceful pond. Sentence 3: They liked to sit on their deck and watch the sun set on the water. Sentence 4: They couldn't imagine living anywhere else! Sentence 5: They were so grateful for their beautiful home.

Ex Output:
54