Challenge: Separate the Names in a Set into Two Sets

A set contains names that begin either with 'A' or with 'B'. Write a program to separate the names into two sets—one containing names beginning with 'A' and the other containing names beginning with 'B':

• Input: A set that contains names that begin either with 'A' or with 'B'.
• Output: Two sets—one that containing names beginning with 'A' and the other containing names beginning with 'B'.