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: Jill got a call from her friend Betty. Sentence 2: She told her there was big party at Brad's tonight. Sentence 3: Jill was so excited to go with Betty. Sentence 4: The two got dressed and headed to the party. Sentence 5: Jill and betty danced the night away at the party. Choices: a. Jill wants to party. b. Rex Drinks Tea.
Example Output: a

Example Input: Sentence 1: The Smiths decided to go to their summer home for vacation. Sentence 2: They drove across three states to reach their summer home. Sentence 3: They hiked, fished, swam, barbecued, and shopped while there. Sentence 4: They spent a whole week at their summer home. Sentence 5: They could not stop talking about their vacation for a week. Choices: a. Summer Home. b. Very bad burn.
Example Output: a

Example Input: Sentence 1: Tom wanted to be a published author. Sentence 2: He was a subject matter expert regarding martial arts. Sentence 3: He decided to write about the combative arts. Sentence 4: He wrote a great book. Sentence 5: He became a published author. Choices: a. Ugly Sweater. b. Book.
Example Output:
b