You will be given a definition of a task first, then some input of the task.
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: Paper. Sentence 1: We told the coach he left something in my car. Sentence 2: We were not supposed to leave once we got there. Sentence 3: But my friend left his homework at home. Sentence 4: I gave him a ride. Sentence 5: I used to come to school early to run.
Output:
51