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: An Unwelcome Encounter. Sentence 1: Dan opened the lattice door to get access under the porch. Sentence 2: He ducked his head and crouched to get through the opening. Sentence 3: His fright ebbed when he realized it was just a small garter snake. Sentence 4: With a rush of adrenaline, he scrambled away from the opening. Sentence 5: Just as he looked up he saw a dark body rustling under the leaves.
53