ülle

/ylle/

Cases

SingularPluralWhen to use it
nominativeüllethe smoking pipeüllelethe smoking pipesthe plain dictionary form — the doer of the sentence
genitiveüllenithe smoking pipe'süllelenithe smoking pipes'the owner — whose it is
accusativeüllenithe smoking pipe (as the object)üllelenithe smoking pipes (as the object)a specific, known object — whom or what
dativeüllegeto the smoking pipeüllelegeto the smoking pipesdirection or recipient — to where, to whom
locativeülledeat / in the smoking pipeülleledeat / in the smoking pipeswhere it is; also having — mende bar, "I have it"
ablativeülledenfrom the smoking pipeülleledenfrom the smoking pipeswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
myüllemmy smoking pipeüllelerimmy smoking pipes
yourüllengyour smoking pipeülleleringyour smoking pipes
his / herüllesihis / her smoking pipeüllelerihis / her smoking pipes
ourüllebizour smoking pipeülleleribizour smoking pipes
you all'süllegizyou all's smoking pipeüllelerigizyou all's smoking pipes
theirülleleritheir smoking pipeülleleritheir smoking pipes

The overlap in the last rows is real, not a mistake: ülleleri can mean "his / her smoking pipes", "their smoking pipe", or "their smoking pipes" — context decides.