Lithuania–Russia border
The long border passes ( from west to south-east clockwise ) through the Curonian Spit and Curonian Lagoon , and then follows along the Neman River , Šešupė , Širvinta , Liepona , and Lake Vištytis . 
<triplet> Neman River <subj> Šešupė <obj> tributary <triplet> Šešupė <subj> Neman River <obj> mouth of the watercourse