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: Jan and Julie were sisters. Sentence 2: The sisters were complete opposites. Sentence 3: Jan loved art and Julie loved numbers. Sentence 4: One day, the sisters decided to open a clothing store. Sentence 5: The sisters combined their talents to create a successful business. Choices: a. Sisters. b. The poisonous bush.
Example Output: a

Example Input: Sentence 1: Jenny bought many new T-shirts at the beginning of the summer. Sentence 2: But as she stayed in and didn't exercise, they didn't fit by August. Sentence 3: She had to give them all to a charity. Sentence 4: Now every morning she only has old shirts to wear. Sentence 5: So she's going to buy new clothes this afternoon. Choices: a. Changing size. b. Frog.
Example Output: a

Example Input: Sentence 1: Michael needed to drive nearly 10 hours for a meeting. Sentence 2: He got ready for the long drive! Sentence 3: He asked me if the car had any gas and I said yes, it was full. Sentence 4: So he started on his way. Sentence 5: After he got there he called me and said he made it safe. Choices: a. Michael's Drive. b. Student President.
Example Output:
a