def tautograma(frase):
c = frase[0].casefold()
return all(p[0].casefold() == c for p in frase.split())
print(tautograma('Dentro desta devassa desilusão, Deixaste dias dourados de desalentos, Decorados de déspota dor.')) # True
print(tautograma('abc aaa xyz')) # False
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