orkestr

/orkestr/

Cases

SingularPluralWhen to use it
nominativeorkestrthe orchestraorkestrlethe orchestrasthe plain dictionary form — the doer of the sentence
genitiveorkestrnithe orchestra'sorkestrlenithe orchestras'the owner — whose it is
accusativeorkestrnithe orchestra (as the object)orkestrlenithe orchestras (as the object)a specific, known object — whom or what
dativeorkestrgeto the orchestraorkestrlegeto the orchestrasdirection or recipient — to where, to whom
locativeorkestrdeat / in the orchestraorkestrledeat / in the orchestraswhere it is; also having — mende bar, "I have it"
ablativeorkestrdenfrom the orchestraorkestrledenfrom the orchestraswhere 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
myorkestrimmy orchestraorkestrlerimmy orchestras
yourorkestringyour orchestraorkestrleringyour orchestras
his / herorkestrihis / her orchestraorkestrlerihis / her orchestras
ourorkestribizour orchestraorkestrleribizour orchestras
you all'sorkestrigizyou all's orchestraorkestrlerigizyou all's orchestras
theirorkestrleritheir orchestraorkestrleritheir orchestras

The overlap in the last rows is real, not a mistake: orkestrleri can mean "his / her orchestras", "their orchestra", or "their orchestras" — context decides.