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: Childhood friends forever. Sentence 1: Nick and Pat met when they were 7 years old. Sentence 2: They are now 53 years old and they are still the closest of friends. Sentence 3: They went to the same schools and always hung out together. Sentence 4: When they became adults Nick moved away but they still kept in touch. Sentence 5: They lived across the street from one another when they were children.
A:
52