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: Full Closet. Sentence 1: Tom was trying to pick out clothes. Sentence 2: He had trouble finding anything he wanted to wear. Sentence 3: He also noticed his closet was really full. Sentence 4: Tom decided to get rid of a lot of his old clothes. Choices: a. He was never able to pay it back. b. It freed up a lot of closet space.
Example Output: b

Example Input: Title: Snake Encounter. Sentence 1: Sally wasn't very familiar with snakes, and had never seen a wild one. Sentence 2: She and her cousin liked to jump from rock to rock in the river. Sentence 3: She was very scared when a snake appeared right below her. Sentence 4: Chris convinced her to stay calm while he moved the snake carefully. Choices: a. Every weekend, he decided to eat at the same restaurant. b. She was grateful, and rather proud of herself for being so calm.
Example Output: b

Example Input: Title: Class. Sentence 1: I ran into class about twenty minutes late. Sentence 2: I had missed the beginning of the lecture. Sentence 3: The teacher told me he would lock me out next time. Sentence 4: Frustrated, I sat down and listened. Choices: a. After class, I told him I didn't appreciate his condescension. b. He felt his fitness improve due to the heat.
Example Output:
a