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https://ru.wikipedia.org/wiki/%D0%9D%D0%B0%D1%80%D0%B0%D0%BA%D0%B0_(%D0%B1%D1%83%D0%B4%D0%B4%D0%B8%D0%B7%D0%BC)#%D0%92%D0%BE%D1%81%D0%B5%D0%BC%D1%8C_%D0%B3%D0%BE%D1%80%D1%8F%D1%87%D0%B8%D1%85_%D0%B0%D0%B4%D0%BE%D0%B2