Instructions: 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: For Kory's 16th birthday he wanted to go to a concert. Sentence 2: His favorite band was playing the weekend of his birthday. Sentence 3: His grandparents bought he and his parents tickets for great seats. Sentence 4: Kory was very excited and anxious for the concert. Sentence 5: He had a great time with his parents at the concert and was very happy. Choices: a. The Concert. b. Operation.
Output:
a