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: Kia signed up for guitar lessons. Sentence 2: At first she was terrible. Sentence 3: She couldn't strum any chords properly! Sentence 4: But after a few weeks she improved. Sentence 5: Soon Kia was an expert guitarist. Choices: a. The crash. b. Strum.

Ex Output:
b

Ex Input:
Sentence 1: The bird sat in the tree early that morning. Sentence 2: It began to feel rather alone. Sentence 3: It started cawing loudly from the branch. Sentence 4: No other birds appeared in the tree. Sentence 5: The bird simply sang, waking everyone in the neighborhood. Choices: a. Wondering. b. Caw.

Ex Output:
b

Ex Input:
Sentence 1: Susie wanted to read the newspaper. Sentence 2: So she went outside to look for it. Sentence 3: Unfortunately it was nowhere to be found. Sentence 4: Susie was upset. Sentence 5: So she called up the paper to complain. Choices: a. Purchasing. b. No paper today.

Ex Output:
b