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: Susie noticed there was a concert coming up. Sentence 2: Problem was she could not afford it. Sentence 3: Luckily she entered in a competition to win a ticket. Sentence 4: To her delight, she won. Sentence 5: She was very happy. Choices: a. Winning tickets. b. New deals.
Example Output: a

Example Input: Sentence 1: Dan wanted to take his girlfriend to a nice restaurant. Sentence 2: Dan asked her friends where she really liked to eat. Sentence 3: Dan took their advice, taking his girlfriend to the recommended place. Sentence 4: Dan waited until the end of the dinner, and proposed. Sentence 5: Dan's girlfriend cried and said yes! Choices: a. Dinner Proposal. b. Fit Dan.
Example Output: a

Example Input: Sentence 1: Brian wanted to go to a concert with friends. Sentence 2: His boss would not let him have time off. Sentence 3: He decided to switch shifts with a coworker. Sentence 4: Brian went to the concert and had a great time. Sentence 5: Brian now owes his co worker a favor in the future. Choices: a. Proposal. b. Concert.
Example Output:
b