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.
Problem:Title: Blitzkrieg!. Sentence 1: After taking Poland, Hitler decided he wanted more territory. Sentence 2: He decided to attack France now. Sentence 3: Paris is now in Hitler's hands. Sentence 4: So Hitler marched his armies through Belgium. Sentence 5: France had prepared earlier for just such an attack.
Solution:
53