text: #coding=utf-8
  #人生不同阶段P76 2017.4.14
  age = 1
  while age>0:
  	try:
  		age = input('please input your age (input 0 to exit)\n')
  		age = int(age)
  	except:
  		print("ERROR INPUT,please input a right age!\n")
  		age = 1
  		continue
  	if age<2:
  		print('You are just a little baby')
  	elif age>=2 and age<4:
  		print('oh~ You should learn how to walk and run')
  	elif age>=4 and age<13:
  		print("Little guy,it's time to go to school")
  	elif age>=13 and age<20:
  		print('Teenager go to search your own lover')
  	elif age>=20 and age<65:
  		print('MAN,you are the middle of your famliy')
  	elif age>=65 and age<120:
  		print("Oldman,which moment you can forgot in your whole life?")
  	else:
  		print("Don't kidding me,OK?")
  
  