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.

Title: Lipstick. Sentence 1: It was for $50 at her favorite makeup store. Sentence 2: She was excited when she found the coupon. Sentence 3: She browsed the site for hours. Sentence 4: She chose her purchase carefully. Sentence 5: She bought a bright red lipstick that was very expensive.
21