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'.

Example Input: Sentence 1: The man sharpened the saw blade. Sentence 2: His hand slipped. Sentence 3: He cut his arm on the saw blade. Sentence 4: He cleaned up the blood. Sentence 5: He finished sharpening the saw blade. Choices: a. Saw. b. The cookout.
Example Output: a

Example Input: Sentence 1: Big Mama the frog lived with me for a few months. Sentence 2: We put her in a large aquarium in the living room. Sentence 3: We filled it up with rocks and sticks, and a little water. Sentence 4: We bought flies for her from the bait shop. Sentence 5: One day my brother decided to dissect her instead of keeping her. Choices: a. Silver Dollar City. b. Mama the Frog.
Example Output: b

Example Input: Sentence 1: Gertrude hated sharing her toys with her brother Billy. Sentence 2: He would always ruin her toys. Sentence 3: Billy tried to play with Gertrude's toy car, but she snatched it away. Sentence 4: Billy began crying, and their mother rushed to check on them. Sentence 5: Their mother took the toys and made them both go to sleep. Choices: a. Sharing Toys. b. Five Cents.
Example Output:
a