Declension table of ?prasta

Neuter	Singular	Dual	Plural
Nominative	prastam	praste	prastāni
Vocative	prasta	praste	prastāni
Accusative	prastam	praste	prastāni
Instrumental	prastena	prastābhyām	prastaiḥ
Dative	prastāya	prastābhyām	prastebhyaḥ
Ablative	prastāt	prastābhyām	prastebhyaḥ
Genitive	prastasya	prastayoḥ	prastānām
Locative	praste	prastayoḥ	prasteṣu

Compound prasta -

Adverb -prastam -prastāt