Declension table of sumana

Neuter	Singular	Dual	Plural
Nominative	sumanam	sumane	sumanāni
Vocative	sumana	sumane	sumanāni
Accusative	sumanam	sumane	sumanāni
Instrumental	sumanena	sumanābhyām	sumanaiḥ
Dative	sumanāya	sumanābhyām	sumanebhyaḥ
Ablative	sumanāt	sumanābhyām	sumanebhyaḥ
Genitive	sumanasya	sumanayoḥ	sumanānām
Locative	sumane	sumanayoḥ	sumaneṣu

Compound sumana -

Adverb -sumanam -sumanāt