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password = input()

lower = False
upper = False
length = False
digit = False

if len(password) > 8:
    length = True

for i in password:
    if i.islower():
        lower = True
    if i.isupper():
        upper = True
    if i.isdigit():
        digit = True

if lower and upper and length and digit:
    print("Пароль надежный")
else:
    print("Пароль ненадежный")