Declension table of ?prasta

Masculine	Singular	Dual	Plural
Nominative	prastaḥ	prastau	prastāḥ
Vocative	prasta	prastau	prastāḥ
Accusative	prastam	prastau	prastān
Instrumental	prastena	prastābhyām	prastaiḥ prastebhiḥ
Dative	prastāya	prastābhyām	prastebhyaḥ
Ablative	prastāt	prastābhyām	prastebhyaḥ
Genitive	prastasya	prastayoḥ	prastānām
Locative	praste	prastayoḥ	prasteṣu

Compound prasta -

Adverb -prastam -prastāt