Orsk vs Ostrá

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Orsk (Russian: Орск) is the second largest city in Orenburg Oblast, Russia, located on the steppe about 100 kilometers (62 mi) southeast of the southern tip of the Ural Mountains. The city straddles the Ural River. Since this river is considered a boundary between Europe and Asia, Orsk can be said to lie in two continents.

Population: 239,800 (2010 Census); 250,963 (2002 Census); 270,711 (1989 Census). It lies adjacent to the Kazakhstan–Russia border.

Source: Wikipedia