# -*- coding: utf-8 -*-
"""
Created on Fri May 21 21:50:17 2021

@author: PC
"""

import re
def names():
    simple_string = """Amy is 5 years old, and her sister Mary is 2 years old. 
    Ruth and Peter, their parents, have 3 kids."""

    names = re.findall('[A-Z][a-z]*', simple_string)
    #raise NotImplementedError()
    print(names)
    return names
    
assert len(names()) == 4