Certain prepositions need to be followed by the accusative case, and are known as the accusative prepositions:
If learnt in the order above, you’ll see that the initial letters of the accusative prepositions spell FUDGEBOW. A good way to remember the accusative prepositions is to ‘accuse someone of stealing your fudge bow’.
In Ulm und um Ulm und um Ulm herum is a German Zungenbrecher - tongue twister. It means 'in Ulm and round Ulm and around Ulm'.
Ulm is an attractive city in the southern German state of Baden-Württemberg, situated on the River Danube – die Donau. The Austrian composer Johann Strauss II wrote the well-known waltz The Blue Danube, which is known in German as An der schönen blauen Donau.