Email Frequency Counter

Write a program to count the frequency of email addresses from input. Emails are provided one per line. The end of input is indicated by an empty line. Your program should output each email followed by its frequency in a new line. Example input: john.doe@example.com jane.doe@example.com john.doe@example.com Output should format: john.doe@example.com 2 jane.doe@example.com 1