RepulsiveDarkmagentaWhippoorwill

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def f(a):
	print('. '.join(x.strip().capitalize() for x in a.split('.') if x!='')+'.')

tests = [
'tHIS SenteNce HAS veRy bAd GrammAr.'# ==> This sentence has very bad grammar.
,'PuncTuation must-be PReserved.'# ==> Punctuation must-be preserved.
,'full StOps ShoulD Be inserted'# ==> Full stops should be inserted.
,'MultiPLe sEntEnceS Are possible. thEY Are, yoU KNOW.'# ==> Multiple sentences are possible. They are, you know.
,'MultiPle spaCes are REPLACEd.  reallY'# ==> Multiple Spaces are replaced. Really.
,'spaces. are.inserted.'# ==> Spaces. Are. Inserted.
]

for t in tests:
	f(t)
	
print('. '.join(x.strip().capitalize() for x in input().split('.') if x!='')+'.')