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'.

Ex Input:
Sentence 1: Dave is a mailman. Sentence 2: He works at the same post office as my husband. Sentence 3: Whenever there is a lot of work he calls out repeatedly. Sentence 4: He's earned his pension but is too young to retire. Sentence 5: But at least when he calls out my husband gets more hours. Choices: a. Dave. b. Adapter.

Ex Output:
a

Ex Input:
Sentence 1: Tim was going to drive a friend home. Sentence 2: The friend had too much to drink. Sentence 3: He couldn't get the friend's keys to work. Sentence 4: The friend was too drunk to help. Sentence 5: He had taken the wrong keys by accident. Choices: a. Swimming. b. Wrong Key.

Ex Output:
b

Ex Input:
Sentence 1: Tom and Mary uses the same clock. Sentence 2: Mary also turned the clock hand so that it was five minutes fast. Sentence 3: Tom also turned the clock hand so that it was five minutes fast. Sentence 4: Tom and Mary went to a meeting. Sentence 5: They were both ten minutes early for the meeting. Choices: a. Ciock. b. Too Late for Food.

Ex Output:
a