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.
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Question: Title: Dust. Sentence 1: The woman found dust on the desk. Sentence 2: The next day the dust was back. Sentence 3: She cleaned it off. Sentence 4: She bought an air filter. Sentence 5: The next time the desk stayed clean for a week.

Answer: 23

Question: Title: Calorie Counting. Sentence 1: Soon, she was down ten pounds. Sentence 2: She counted each calorie she ate. Sentence 3: Nancy was trying to lose weight. Sentence 4: Nancy was determined to keep going. Sentence 5: By the end of the year, she had lost another ten!

Answer: 31

Question: Title: Found Phone. Sentence 1: Tom found a phone once. Sentence 2: It was brand new. Sentence 3: He decided to keep it. Sentence 4: Tom wasn't able to figure out who it belonged to. Sentence 5: Nobody ever claimed it.

Answer:
34