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.

Ex Input:
Title: Mike goes on vacation. Sentence 1: Mike had a very stressful job. Sentence 2: He needed a vacation. Sentence 3: So he took one. Sentence 4: He headed to the sunny beaches of mexico. Choices: a. Mike had a great time on his vacation. b. Eventually Tammy gave up looking.

Ex Output:
a

Ex Input:
Title: Janice Goes Skiing. Sentence 1: Janice decides that she would like to take a ski trip. Sentence 2: She takes the long drive to the mountain. Sentence 3: Finally she arrives. Sentence 4: Janice spends the whole weekend skiing. Choices: a. She now works at her dream job in a salon. b. Janice is happy that she took a ski trip.

Ex Output:
b

Ex Input:
Title: Missed Opportunity. Sentence 1: Alicia dug through all the clothes on the sale rack. Sentence 2: She found the name brand sweater she wanted. Sentence 3: There was one left and she left it near the register. Sentence 4: The clerk left and the new clerk didn't know about the sweater. Choices: a. A shopper saw the sweater near the register and bought it. b. Tom choked under the pressure.

Ex Output:
a