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It flows from Zweilütschinen , where its two tributaries join, on a length of 8.6 km through the Bödeli and into Lake Brienz at Böningen .
The two tribuaries are the 12.3 km long Schwarze Lütschine from Grindelwald and 13.1 km long Weisse Lütschine from the Lauterbrunnen Valley .