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: Purple Heart. Sentence 1: John just got home from serving in the army. Sentence 2: He is upset because his injury will keep him from walking for a while. Sentence 3: He got discharged right away and given a purple heart. Sentence 4: He was overseas and got injured in the line of duty. Sentence 5: Although he is very happy to be home with his family.
42