birthdays = {'Alice': 'Apr 1', 'Bob': 'Dec 12', 'Carol': 'Mar 4'}
while True:
   
   print('Enter a name: (blank to quit)')
   name = input()
   if name == '':
      break
   if name in birthdays:
      print(birthdays[name] + ' is the birthday of ' + name)
   else:
      print('I do not have birthday information for ' + name)
   print('What is their birthday?')
   bday = input()
   birthdays[name] = bday
   print('Birthday database updated.')
