Instructions: In this task, you're given the title and three arbitrary sentences out of a five-sentence story. You are also given three additional sentence options, a, b, and c, that may or may not belong to the story. Your job is to pick the two options that seamlessly connect with the rest of the story; note that the selected choices may fit into the story at any point. Indicate your selected choices in order, i.e., as 'ab'/'bc'/'ac' and not as 'ba'/'ca'/'cb'. If options are equally plausible, pick the ones that make more sense.
Input: Title: Since I had been studying for a week, I felt nothing could go wrong. Just before the exam started, I realized I had not brought my pencil. I frantically asked everyone around me for a pencil. Choices: a. Fortunately, a friend lent me his pencil. b. I had to take a math exam today. c. As he stomped off, I thought I should reconsider our friendship.
Output:
ab