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: Loaf. Sentence 1: Patrick bought a loaf of bread from the store. Sentence 2: He then spread butter over the delicate slices. Sentence 3: With it, he cut the bread into thin slices. Sentence 4: He picked up a knife from his collection of cutlery. Sentence 5: When he was done, his mouth watered with anticipation.
42

Title: Space Bar. Sentence 1: Kate was working on her computer. Sentence 2: Kate knew it was time for a new keyboard. Sentence 3: All of a sudden the space bar stuck. Sentence 4: She was unable to get it unstuck. Sentence 5: She was typing fast and hard.
25

Title: Mars Rover. Sentence 1: The scientists waited for the rover to send images of Mars. Sentence 2: That is what made the rover crash. Sentence 3: The rover had crashed on the surface of the planet. Sentence 4: They discovered they were all using different units of measurement. Sentence 5: The signal from the rover stopped.
52