Ключевые слова: club, coins, collaborate, collaboration, common, common policy, concept, conceptual, continent, cooperate, cooperation, countries, country, currency, eu, euro, euro currency, euro zone, europe, european, european currency, european flag, european union, europeans, flag, flag of europe, integrated, integration, legal tender, logo, monetary union, money, monies, notes, political, politics, single currency, stars, symbol, the eu, top down, trade, transnational, union, united,