regex_charactergroups.py

import re

sentence =  '''Mr. Anderson and Mrs Baker were discussing
Montana when Ms. Campbell walked in with mr Davis and Mrs. Ellis."
'''

pattern = re.compile(r'')

for match in re.finditer(pattern, sentence):
    print(match)



#pattern = re.compile(r'[Mm](rs|r|s)\.?\s\w+[.\s]')