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'.

Ex Input:
Sentence 1: Tom wanted to go swimming. Sentence 2: There was a river near by. Sentence 3: Tom checked the news. Sentence 4: They said that the river was too polluted to swim in. Sentence 5: Tom decided against it. Choices: a. Pictures. b. Dirty River Water.

Ex Output:
b

Ex Input:
Sentence 1: Tim took his son to the fair. Sentence 2: They were trying to hit bottles to win a toy. Sentence 3: His son hit three different bottles. Sentence 4: So he got to choose his toy. Sentence 5: He choose a dog. Choices: a. Winning a toy. b. No gift back.

Ex Output:
a

Ex Input:
Sentence 1: Sam walked into the Haven Sober Living House and rented living space. Sentence 2: But when the house moved, he stressed out and started drinking. Sentence 3: A few nights ago, he got drunk and fought the house manager. Sentence 4: He tried to go to bed after the fight, but he fainted. Sentence 5: The paramedics woke him and then the cops arrested him. Choices: a. The Alcoholic. b. Mental Health.

Ex Output:
a