What is "steinstucken"

Steinstücken, a small settlement with approximately 200 inhabitants, is the southernmost territory of the Berlin borough of Steglitz-Zehlendorf, belonging to Wannsee. From the division of Germany in 1949 until a connecting corridor was created in 1971–72, Steinstücken was the only permanently inhabited of twelve original exclaves of West Berlin in East Germany, while West Berlin itself was an enclave controlled by the Western Allies, surrounded either by East Berlin or East German (GDR) territory.