Selke

The Selke (German pronunciation: [ˈzɛlkə]) is a river of Saxony-Anhalt, Germany.
It is a right-hand tributary of the Bode that starts in the Harz Mountains before breaking out onto the northeastern Harz Foreland. It has a length of 64 kilometres (40 mi), of which 30 kilometres (19 mi) lie in the forested mountains of the Harz and the rest on the agricultural lowlands of the Harz Foreland.

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