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'.

Example Input: Sentence 1: Jill loved watching reality TV shows. Sentence 2: She actually dreamed to be part of one. Sentence 3: One day, she decided to sign up for one of the upcoming shows. Sentence 4: She got chosen to participate. Sentence 5: Jill was very proud to finally be a star in her own TV show. Choices: a. TV star. b. The Target.
Example Output: a

Example Input: Sentence 1: We used to live near train tracks. Sentence 2: We could hear the horns at times. Sentence 3: I am a train buff and loved the sound. Sentence 4: We moved and I thought we were away from the trains. Sentence 5: Last week I heard train horns from a different railroad. Choices: a. Sample. b. Trains.
Example Output: b

Example Input: Sentence 1: Mark and Jo were brainstorming ideas for a children's show. Sentence 2: Mark suggested that a monster attacks the children. Sentence 3: Jo laughed because he thought Mark was joking. Sentence 4: Mark was confused because he thought it was a great idea. Sentence 5: Mark left in a huff for having his ideas mocked. Choices: a. Parade Float. b. Children's Show.
Example Output:
b