Declension table of ?sapattra

Neuter	Singular	Dual	Plural
Nominative	sapattram	sapattre	sapattrāṇi
Vocative	sapattra	sapattre	sapattrāṇi
Accusative	sapattram	sapattre	sapattrāṇi
Instrumental	sapattreṇa	sapattrābhyām	sapattraiḥ
Dative	sapattrāya	sapattrābhyām	sapattrebhyaḥ
Ablative	sapattrāt	sapattrābhyām	sapattrebhyaḥ
Genitive	sapattrasya	sapattrayoḥ	sapattrāṇām
Locative	sapattre	sapattrayoḥ	sapattreṣu

Compound sapattra -

Adverb -sapattram -sapattrāt