Python uppercase conversion conditions

[Jaypeng]

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def Upper_Vowels(newword):
    sentence = input()
    for i in range(len(newword)):
        if i >= 5 :
            def capital(sentence,vowel):
                vowels = 'aeiou'
                newsentence = []
                for word in sentence:
                    if word.lower() in vowels:
                        word = word.isupper()
                newsentence.append(newword)
                return ('[]'.join(newsentence))
                
    
if "__main__" == __name__:
    sentence = input()
    newword = sentence.split()
    print(Upper_Vowels(sentence))