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: Microwave Unsafe. Sentence 1: Pam put leftover soup in a plastic container. Sentence 2: Pam didn't know that the plastic melted and went into the soup. Sentence 3: And the next morning, she reheated it in the microwave. Sentence 4: And after she ate it, she had a headache. Sentence 5: Afterwards Pam realized her plastic containers were not microwave safe.
32