Declension table of ?pusta

Masculine	Singular	Dual	Plural
Nominative	pustaḥ	pustau	pustāḥ
Vocative	pusta	pustau	pustāḥ
Accusative	pustam	pustau	pustān
Instrumental	pustena	pustābhyām	pustaiḥ pustebhiḥ
Dative	pustāya	pustābhyām	pustebhyaḥ
Ablative	pustāt	pustābhyām	pustebhyaḥ
Genitive	pustasya	pustayoḥ	pustānām
Locative	puste	pustayoḥ	pusteṣu

Compound pusta -

Adverb -pustam -pustāt