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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Example Input: Title: Quantum Physics. Sentence 1: Tom was really into quantum physics. Sentence 2: He figured he could learn more about it in college. Sentence 3: He decided to take a course in it. Sentence 4: Unfortunately it was way too advanced for him. Choices: a. Tom had to drop out. b. They acquiesced and she began lessons shortly after.
Example Output: b

Example Input: Title: Semi Accident. Sentence 1: Greg was driving home from work one day. Sentence 2: He reached down to grab his phone because it was ringing. Sentence 3: When he looked up he saw a semi coming towards him. Sentence 4: Greg did not have enough time to turn his car. Choices: a. John went to a live meeting and made a lot of friends. b. He hit the truck head on.
Example Output: a

Example Input: Title: Restriction. Sentence 1: She knew she was fat. Sentence 2: He always told her how unattractive she was. Sentence 3: He didn't want to see her unless she was fully covered. Sentence 4: She began to restrict very hard on calories. Choices: a. The next day, Bobby found his bear freshly washed, sat on the see-saw. b. She became ill from eating only 500 calories per day.
Example Output:
a