Declension table of ?śastaka

Neuter	Singular	Dual	Plural
Nominative	śastakam	śastake	śastakāni
Vocative	śastaka	śastake	śastakāni
Accusative	śastakam	śastake	śastakāni
Instrumental	śastakena	śastakābhyām	śastakaiḥ
Dative	śastakāya	śastakābhyām	śastakebhyaḥ
Ablative	śastakāt	śastakābhyām	śastakebhyaḥ
Genitive	śastakasya	śastakayoḥ	śastakānām
Locative	śastake	śastakayoḥ	śastakeṣu

Compound śastaka -

Adverb -śastakam -śastakāt