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: The Graduate. Sentence 1: Zakiyyah thought she was doing well enough in school to graduate. Sentence 2: She was told failed a class wasn't going to graduate. Sentence 3: She was told to go to summer school if she wanted her diploma. Sentence 4: Zakiyyah spent her summer in school and studied hard. Choices: a. Her daughter denied this accusation. b. Zakiyyah graduated and was given her diploma.

Ex Output:
b

Ex Input:
Title: The Lice. Sentence 1: All the kids at school were itching. Sentence 2: There was lice going around! Sentence 3: They all scratched at their heads. Sentence 4: Their mom's frantic to fix the situation. Choices: a. They washed every blanket and sheet they had. b. It was amazing to be so high up!

Ex Output:
a

Ex Input:
Title: Kids in the Bathroom. Sentence 1: Kayla was a new teacher. Sentence 2: She had allowed two students to go to the restroom. Sentence 3: The students were taking too long to return. Sentence 4: Kayla went check on the students. Choices: a. Joey's parents let him have the dog. b. They were hiding and playing in the bathroom.

Ex Output:
b