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.

Ex Input:
Title: Posters. Sentence 1: Andrew's mom loved Marilyn Monroe. Sentence 2: Andrew ordered her some Marilyn posters for her birthday. Sentence 3: He was waiting all week for them to arrived. Sentence 4: Finally two days before her birthday he got them from delivery. Choices: a. Frank ate dinner alone and was sad the surprise was ruined. b. He gave them to her for her birthday and she loved them.

Ex Output:
a

Ex Input:
Title: Samich. Sentence 1: Lucy sat down, crying. Sentence 2: She was eating a very delicious bacon sandwich. Sentence 3: Sandwiches like this always brought back sweet memories. Sentence 4: She was transported back into the past. Choices: a. Tom was too embarrassed to ask. b. She was a little girl again watching her father slaughter pigs.

Ex Output:
a

Ex Input:
Title: Helicopter. Sentence 1: Nicole's boyfriend booked a helicopter ride for the two of them. Sentence 2: Nicole was scared to fly. Sentence 3: Her boyfriend assured her she would be safe. Sentence 4: Nicole decided to give the helicopter a try. Choices: a. She was proud of herself for facing her fears. b. Bob was surprised to see his feline visitor.

Ex Output:
b