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東日本の人に「関東は冬の夕暮れが早くてつらい」って話すと…
→ “If you tell people in Eastern Japan that 'Kanto's winter twilights are early and tough'...”
東日本 Higashi-Nihon = Eastern Japan (noun phrase)
東 higashi = east / eastern
日本 nihon = Japan
の no = of / belonging to (possessive particle)
人 hito = person / people (noun)
に ni = to / towards (directional/dative particle)
「 = opening quotation mark (punctuation)
関東 Kantō¹ = Kanto region (proper noun)
は wa = topic marker particle
冬 fuyu = winter (noun)
の no = of / belonging to (possessive particle)
夕暮れ yū¹gure = twilight / dusk (noun)
夕 yū¹ = evening / sunset
暮れ gure = twilight / fading
が ga = subject marker particle
早くて hayakute = early and... (adjective - te form)
つらい tsurai = tough / painful / hard (adjective)
」 = closing quotation mark (punctuation)
って tte = saying / quote particle (colloquial contraction of "to")
話 hanashi = talk / story / conversation (noun)
すと su to = when I say / if I say (contraction of "suru to")
… = ellipsis (indicating trailing off or anticipation)