Please help.
Idon’t know where to put the function to check if there are no vowels in sentence without breaking the program.

Expected output : Ellohay, thray oyeway.
Output : Ohellay, rthay oyeway.

def pig_latin(String):
    Fin = []

    if String[-1] in '!.?':
        punc = String[-1]
        String = String[:-1]

    else:
        punc = ''
    StringList = String.split() 

    for word in StringList:
        if word[-1] == ',':
            comma = ','
            word = word[:-1]
        else:
            comma = ''
        if word[0] in 'aeiouAEIOU':
            Fin.append(word + 'way' + comma)

        else:
            for index, letter in enumerate(word):
                if letter in 'aeiou':
                    Fin.append(word[index:] + word[:index] + 'ay' + comma)
                    break
                else:
                    Fin.append(word[-1] + word[:-1] + 'ay' + comma)
                    break

    for index, word in enumerate(Fin):
        for letter in word:
            if letter == letter.upper():
                uletter = word[0].upper()
                Fin[index] = uletter + word[1:].lower()

    print((' ').join(Fin)+punc)
pig_latin("Hello, thr oye.")