def is_palindrome4(s):
f = False
n = 0
while 3 + n < len(s):
if s[0 + n] + s[1 + n] == (s[2 + n] + s[3 + n])[::-1]:
f = True
break
n += 1
return(f)
s = input('Введите строку: ')
if len(s) >= 4:
print(is_palindrome4(s))
else:
print('В строке меньше 4 цифр!')