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: Mark decides he has studied enough for a little while. Sentence 2: He leaves the library and notices some other students playing frisbee. Sentence 3: He joins them and plays for a few hours. Sentence 4: Mark is happy with his study break. Sentence 5: He decides to return to the library. Choices: a. Mark Plays Frisbee. b. Nanny and Grandpa.

Ex Output:
a

Ex Input:
Sentence 1: Kyle stood nervously in front of the 140 students. Sentence 2: He was introduced by the professor in charge of the class. Sentence 3: He wished he had brought water because his mouth felt full of cotton. Sentence 4: It was time, and he opened his mouth, hoping words would come out. Sentence 5: They did, and the professor praised him for how well his lecture went. Choices: a. Teaching Class. b. Winning the Lottery.

Ex Output:
a

Ex Input:
Sentence 1: I went on vacation to Miami. Sentence 2: Someone stole my luggage at the bus station. Sentence 3: Then I lost my wallet. Sentence 4: I decided to just go home. Sentence 5: Once I got home I realized that this was where I belonged. Choices: a. Worst Vacation Ever. b. best of friends.

Ex Output:
a