Given the task definition and input, reply with output. 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: The Dog. Sentence 1: Justin surprised his kids with a pet. Sentence 2: The kids all cried. Sentence 3: While they slept, the dog ripped apart their whole living room. Sentence 4: Justin said the dog had to go back. Sentence 5: It was a dog from the animal shelter.

52