Declension table of ?manmanasa

Neuter	Singular	Dual	Plural
Nominative	manmanasam	manmanase	manmanasāni
Vocative	manmanasa	manmanase	manmanasāni
Accusative	manmanasam	manmanase	manmanasāni
Instrumental	manmanasena	manmanasābhyām	manmanasaiḥ
Dative	manmanasāya	manmanasābhyām	manmanasebhyaḥ
Ablative	manmanasāt	manmanasābhyām	manmanasebhyaḥ
Genitive	manmanasasya	manmanasayoḥ	manmanasānām
Locative	manmanase	manmanasayoḥ	manmanaseṣu

Compound manmanasa -

Adverb -manmanasam -manmanasāt