import random

greeting = input("Talk to Grandma : ")

while greeting == True:
    if greeting.islower():
        print ("HUH?! SPEAK UP, GIRL!")
        print (' ')
        greeting = input("Talk to Grandma : ")
    elif greeting.isupper() and "BYE" not in greeting:
        for x in range(1):
            print ("NO, NOT SINCE " + str(random.randint(1900,1940)) + "!")
            print (' ')
            greeting = input("Talk to Grandma : ")
    elif greeting.isupper() == "BYE" or " ":
        print ("SEE YA!")