Declension table of ?sumānasa

Masculine	Singular	Dual	Plural
Nominative	sumānasaḥ	sumānasau	sumānasāḥ
Vocative	sumānasa	sumānasau	sumānasāḥ
Accusative	sumānasam	sumānasau	sumānasān
Instrumental	sumānasena	sumānasābhyām	sumānasaiḥ sumānasebhiḥ
Dative	sumānasāya	sumānasābhyām	sumānasebhyaḥ
Ablative	sumānasāt	sumānasābhyām	sumānasebhyaḥ
Genitive	sumānasasya	sumānasayoḥ	sumānasānām
Locative	sumānase	sumānasayoḥ	sumānaseṣu

Compound sumānasa -

Adverb -sumānasam -sumānasāt