Sázava

The Sázava (Czech pronunciation: [ˈsaːzava]) is a river in the Czech Republic, a right tributary of the Vltava River. It flows through the Vysočina and Central Bohemian regions. It is 225.9 km (140.4 mi) long, making it the 6th longest river in the Czech Republic.

Source: Wikipedia https://en.wikipedia.org/wiki/Sázava_(river)