'''
text = "abcdefghijklmnopqrstuvwxyz"
shift = 3

shifted_text = ""

for character in text:

    if character.isalpha():
        shifted_char = chr((ord(character)+shift))

        shifted_text += shifted_char

print(shifted_text)        
'''

'''
number_end = int(input("숫자를 입력하세요:"))
total = 0

for i in range(1,number_end+1):
    total += i


print(f"합산: {total}")                 
'''

'''
text = input("문장을 입력하세요:")
total = 0

for character in text:
    if character.isnumeric():
        total += 1

print(f"숫자의 개수: {total}")        
'''

'''
text = "abcdefghijklmnopqrstuvwxyz"

flag = 0

for character in text:

    shift_number = int(ord(character))

    if shift_number % 2 == 1:
        print("{}({})".format(shift_number,character),end = " ")

    else:
        print("{}({})".format(character,shift_number),end = " ")

'''

'''
text = input("문장을 입력하세요: ")
vowels = "aeiouAEIOU"
shifted_text = ""
shifted_total = 0
for character in text:

    if character in vowels:
        shifted_text += "*"
        shifted_total += 1

    else:
        shifted_text += character

print(" ")        
print(text)
print(f"변환된 문장: {shifted_text}")
print(f"바뀐 모음의 개수: {shifted_total}")
'''

import random

text = ""

for i in range(0,6):

    value_flag = random.randint(0,1)

    if value_flag == 0:
        character = chr(random.randint(48,57))
        text += character

    if value_flag == 1:
        character = chr(random.randint(65,90))
        text += character

print(text)