Declension table of ?sāttra

Masculine	Singular	Dual	Plural
Nominative	sāttraḥ	sāttrau	sāttrāḥ
Vocative	sāttra	sāttrau	sāttrāḥ
Accusative	sāttram	sāttrau	sāttrān
Instrumental	sāttreṇa	sāttrābhyām	sāttraiḥ sāttrebhiḥ
Dative	sāttrāya	sāttrābhyām	sāttrebhyaḥ
Ablative	sāttrāt	sāttrābhyām	sāttrebhyaḥ
Genitive	sāttrasya	sāttrayoḥ	sāttrāṇām
Locative	sāttre	sāttrayoḥ	sāttreṣu

Compound sāttra -

Adverb -sāttram -sāttrāt