Declension table of sattra

Neuter	Singular	Dual	Plural
Nominative	sattram	sattre	sattrāṇi
Vocative	sattra	sattre	sattrāṇi
Accusative	sattram	sattre	sattrāṇi
Instrumental	sattreṇa	sattrābhyām	sattraiḥ
Dative	sattrāya	sattrābhyām	sattrebhyaḥ
Ablative	sattrāt	sattrābhyām	sattrebhyaḥ
Genitive	sattrasya	sattrayoḥ	sattrāṇām
Locative	sattre	sattrayoḥ	sattreṣu

Compound sattra -

Adverb -sattram -sattrāt