In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Example Input: Title: Slugger. Sentence 1: Mark was never a good baseball player. Sentence 2: He practiced everyday with his dad. Sentence 3: No matter how much he tried, he never got better. Sentence 4: He went to his Saturday baseball game feeling hopeless. Choices: a. When it was his turn to bat, he knocked it out of the park! b. Mary screamed and ran inside the warm house.
Example Output: a

Example Input: Title: Shoes. Sentence 1: Kate loved to buy shoes. Sentence 2: She had over 100 pairs. Sentence 3: One day she decided to give some away. Sentence 4: She was glad she was able to help other people. Choices: a. Everyone loved the cookies, and that was the start of her business. b. She decided to keep on helping others.
Example Output: b

Example Input: Title: Birthday Gifts. Sentence 1: Terra had a birthday party at the park. Sentence 2: Her friends brought gifts. Sentence 3: They sat in a circle to watch Terra open them. Sentence 4: Terra got three identical soccer balls from three friends. Choices: a. Marvin got three stitches above his eye. b. Terra and her friends laughed at the coincidence.
Example Output:
b