paket

/paket/

Cases

SingularPluralWhen to use it
nominativepaketthe bagpaketlethe bagsthe plain dictionary form — the doer of the sentence
genitivepaketnithe bag'spaketlenithe bags'the owner — whose it is
accusativepaketnithe bag (as the object)paketlenithe bags (as the object)a specific, known object — whom or what
dativepaketgeto the bagpaketlegeto the bagsdirection or recipient — to where, to whom
locativepaketdeat / in the bagpaketledeat / in the bagswhere it is; also having — mende bar, "I have it"
ablativepaketdenfrom the bagpaketledenfrom the bagswhere 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
mypaketimmy bagpaketlerimmy bags
yourpaketingyour bagpaketleringyour bags
his / herpaketihis / her bagpaketlerihis / her bags
ourpaketibizour bagpaketleribizour bags
you all'spaketigizyou all's bagpaketlerigizyou all's bags
theirpaketleritheir bagpaketleritheir bags

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