In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.

Example Input: Sentence 1: Paul was having a pool party . Sentence 2: Everyone was having a good time until it started to rain. Sentence 3: Paul suggested they take the party inside in case it began lightning. Sentence 4: Because he thought it wasn't going to hurt, Johnny stayed in the pool. Sentence 5: While everyone was inside dancing, flash of lightning hit the pool. Choices: a. Lightning Strikes. b. Free Meal.
Example Output: a

Example Input: Sentence 1: The United States entered World War II. Sentence 2: Industry began to grow. Sentence 3: People went off to war. Sentence 4: The war went for a while. Sentence 5: The Allied forces won. Choices: a. Rodeo. b. World Event.
Example Output: b

Example Input: Sentence 1: Alex downloaded some music online. Sentence 2: He listened to it. Sentence 3: His computer began to freak out. Sentence 4: He tried to find the problem. Sentence 5: The computer broke because of a virus. Choices: a. Tribe. b. Virus.
Example Output:
b