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: Our treehouse was on the ground. Sentence 2: We were afraid of heights so we found a tree with a big hole. Sentence 3: We climbed inside and sat there to talk for hours. Sentence 4: We played with the little bugs in the dirt. Sentence 5: We met there every day for years. Choices: a. Treehouse. b. New Chickens.

Ex Output:
a

Ex Input:
Sentence 1: Tina and her friendship with Erica was going down the tubes. Sentence 2: The two girls were just not getting along. Sentence 3: Tina apologized to Erica. Sentence 4: Erica did not accept the apology. Sentence 5: Tina felt defeated. Choices: a. No apology accepted. b. Freezing beach.

Ex Output:
a

Ex Input:
Sentence 1: Jim was a great basketball player. Sentence 2: He always scored many points. Sentence 3: One day a friend challenged him to a friendly game. Sentence 4: Jim agreed and did not play as well as he thought. Sentence 5: Jim learned his skills were not always that great. Choices: a. Basketball. b. Grace's New Treadmill.

Ex Output:
a