Definition: 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'.
Input: Sentence 1: Jim bought a coat at a thrift store. Sentence 2: He wore it out of the store. Sentence 3: When he put his hand in the pocket he felt something. Sentence 4: He pulled out an old letter. Sentence 5: Jim had no idea that this was in the coat when he bought it! Choices: a. Whale Watching.. b. Secret letter.

b