Definition: 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.
Input: Title: Climbing. Sentence 1: Today I climbed a tree. Sentence 2: I grabbed the lowest branch. Sentence 3: I tried to pull myself up. Sentence 4: I had a lot of trouble getting up in the tree. Choices: a. I made it onto the first branch. b. She substituted in a bit of her very favorites from her stash.
Output:
a