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.')