# coding=utf-8
#!/usr/bin/python
# Write Python 3 code in this online editor and run it.
from random import randint
from sys import exit
yes=1
ye=1
xiao=['a','b','c','d','e','f',
'g','h','i','j','k','l',
'm','n','o','q','p','r',
't','s','u','v','w','x','y',
'z']
da=['A','B','C','D','E','F',
'G','H','I','J','K','L',
'M','N','O','P','Q','R',
'T','U','S','V','W','X','Y',
'Z']
def three_engling():
global yes
global ye
yes = input("是1退0")
ye = yes.isdigit()
print(ye)
def tt():
global yes
global ye
while ye == False:
print('请勿非法输入。')
yes = input("是1退0")
ye = yes.isdigit()
print('请勿非法输入。')
if ye == False:
cc()
else:
break
def dd():
global yes
yes = int(yes)
if yes > 1:
print('请勿非法输入。')
cc()
if yes ==0:
exit(0)
def sc():
y=randint(0,2)
if y==0:
d=randint(0,25)
one=xiao[d]
else:
d = randint(0,25)
one = da[d]
if y==1:
q= randint(0,25)
two = xiao[q]
else:
q = randint(0,25)
two = da[q]
if y==2:
z=randint(0,25)
three=xiao[z]
else:
z=randint(0,25)
three=da[z]
numbers = randint(1000000,99999999)
g=str(one)+str(two)+str(three)+'.'+str(numbers)
print(g)
cc()
def cc():
three_engling()
tt()
dd()
sc()
cc()