Detailed Instructions: 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.
Q: Title: Vegan Child. Sentence 1: My friend Sally became a vegan at age twenty. Sentence 2: Both kids ate meat and grew to be taller than their big brother. Sentence 3: She had a boy and raised him as a vegan. Sentence 4: She stopped being a vegan a few years later, and had two more kids. Sentence 5: She stopped using artificial contraceptives.
A:
52