Q: 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: Borderlands. Sentence 1: We all really love playing Borderlands together now. Sentence 2: Unfortunately we only had two computers and there were three of us. Sentence 3: We spent a while occasionally tinkering with spare parts. Sentence 4: Eventually we combined two broken PCs to make one working one. Sentence 5: All of the people in my house like the game Borderlands.
A:
51