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.
Input: Title: Blind Date. Sentence 1: Her friends meant well, but they never worked out. Sentence 2: Ivy was so sick of blind dates! Sentence 3: She agreed to one last dinner with an accountant named Rob. Sentence 4: To her happy surprise, Rob was a great guy - funny, smart, and kind! Sentence 5: Ivy and Rob gladly agreed to second dates with each other!
Output:
21