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: Memories of the evil gerbil. Sentence 1: When she did this, the photos of the gerbil always made it look evil. Sentence 2: Her gerbil was white with red eyes. Sentence 3: She took a lot of photos of it with red eye removal enabled. Sentence 4: Bree once had a gerbil. Sentence 5: These particular photos always made her smile after it passed away.
41