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: Fred had to finish up a project for work. Sentence 2: He wanted to finish so he could get home. Sentence 3: But his boss was making him stay. Sentence 4: Fred couldn't believe it. Sentence 5: His boss did not let him home until ten. Choices: a. Having to work late. b. Idiot.
Example Output: a

Example Input: Sentence 1: The teacher assigned a group project. Sentence 2: Jerry told Ben and Tianna that he would do all of the work. Sentence 3: Although they were extremely curious, they allowed him to do so. Sentence 4: When they presented, Jerry claimed that Ben and Tianna did nothing. Sentence 5: The teacher gave Ben and Tianna an F on their reports. Choices: a. newspaper. b. Exposed in Class.
Example Output: b

Example Input: Sentence 1: Martin wants to be a father. Sentence 2: He discusses starting a family with his fiancee. Sentence 3: They decide to start trying for a baby immediately. Sentence 4: A few weeks after their wedding, Martin's new wife shares the news. Sentence 5: Martin and his wife are expecting a baby. Choices: a. Teaching Award. b. Martin's Family.
Example Output:
b