Definition: 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.
Input: Title: The Car in the Road. Sentence 1: Luckily, a neighbor saw it and rescued it for him just in time! Sentence 2: His controller lost battery power, and his car went into the street. Sentence 3: Alex knew he wasn't supposed to go out into the road. Sentence 4: A truck was coming, though, and he thought his toy would get crushed! Sentence 5: Little Alex was playing with his RC car in his driveway.
Output:
51