In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.
Example: Title: Marcus Buys Khakis. Sentence 1: Marcus needed clothing for a business casual event. Sentence 2: All of his clothes were either too formal or too casual. Sentence 3: He decided to buy a pair of khakis. Sentence 4: The pair he bought fit him perfectly.
Example solution: Marcus was happy to have the right clothes for the event.
Example explanation: Marcus is buying clothes for a business event.

Problem: Title: Losing the mail. Sentence 1: Alicia got her mail and took the elevator upstairs. Sentence 2: All the sudden she realized she dropped some letters. Sentence 3: They fell down the hole. Sentence 4: Alicia freaked out.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Solution: She did not know if she could retrieve them.