TASK DEFINITION: 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 and their positions in the sentence order of the story; note that the selected choices may fit into the story at any point. Your answer must be in the form of '2a, 5b', where '2a' means the candidate sentence 'a' will be inserted as the 2nd sentence in the story. The answer must also be in the order of the selected choices, i.e., '2a, 5b' is allowed, and '5b, 2a' is not allowed. If options are equally plausible, pick the ones that make more sense.
PROBLEM: Title: Tonight I played chess against a 1390 opponent. My rating is 1450. My opponent ignored a move. Choices: a. I was losing. b. I think he was either cheap or not hungry. c. I checkmated him.

SOLUTION: 3a, 5c

PROBLEM: Title: He signed up for a class. They practiced a lot. He quit at last. Choices: a. Barry wanted to join a tennis team. b. Just got word that several friends received suspicious emails from me. c. He didn't know if he wanted to keep at it.

SOLUTION: 1a, 4c

PROBLEM: Title: John was opening a new business. He hung the sign out front. John had a great opening day. Choices: a. The sign had attracted a lot of business. b. It was time to compete! c. Soon, customers were streaming in.

SOLUTION:
4a, 3c

