You will be given a definition of a task first, then some input of the task.
In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.

Sentence 1: Riley and friends were going to a ski trip this year for vacation. Sentence 2: They planned to go up to big bear mountain and rent a cabin. Sentence 3: They thought everything was going to go well and as planned. Sentence 4: Everything failed on them one by one, their cabin had no electricity. Sentence 5: When they finally got it an avalanche hit and their vacation was done. Choices: a. The ski trip. b. The Escape.
Output:
a