sumka

/sumka/

Cases

SingularPluralWhen to use it
nominativesumkathe bagsumkalathe bagsthe plain dictionary form — the doer of the sentence
genitivesumkanıthe bag'ssumkalanıthe bags'the owner — whose it is
accusativesumkanıthe bag (as the object)sumkalanıthe bags (as the object)a specific, known object — whom or what
dativesumkağato the bagsumkalağato the bagsdirection or recipient — to where, to whom
locativesumkadaat / in the bagsumkaladaat / in the bagswhere it is; also having — mende bar, "I have it"
ablativesumkadanfrom the bagsumkaladanfrom 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
mysumkammy bagsumkalarımmy bags
yoursumkangyour bagsumkalarıngyour bags
his / hersumkasıhis / her bagsumkalarıhis / her bags
oursumkabızour bagsumkalarıbızour bags
you all'ssumkağızyou all's bagsumkalarığızyou all's bags
theirsumkalarıtheir bagsumkalarıtheir bags

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