def is_vowel_covered(s):
'''
>>> is_vowel_covered("AaaaA")
True
>>> is_vowel_covered("AaaA")
False
>>> is_vowel_covered("AeioUAeioU")
True
>>> is_vowel_covered("aAppAlAa")
False
>>> is_vowel_covered("AaaaaazZ")
False
'''
if len(s) <= 4:
return False
if s[0].isupper () and s[-1].isupper:
if s[1].islower and s[-2].islower:
if s[0] == 'aeiouAEIOU' and s[-1] == 'aeiouAEIOU' and
s[2] == 'aeiouAEIOU' and s[-2] == 'aeiouAEIOU':
return True
if __name__ == '__main__':
import doctest
print(doctest.testmod())
