You will be given a definition of a task first, then some input of the task.
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.

Title: Hidden potential. Sentence 1: Marlene was put in charge of the school festival. Sentence 2: She was chosen by the student council. Sentence 3: Marlene lacked confidence that she would do a good job. Sentence 4: During the event, Marlene demonstrated her great leadership skills. Choices: a. But now he is retiring and can move on to coaching. b. After the event, she was proud and more confident about herself.
Output:
a