Declension table of ?manasa

Masculine	Singular	Dual	Plural
Nominative	manasaḥ	manasau	manasāḥ
Vocative	manasa	manasau	manasāḥ
Accusative	manasam	manasau	manasān
Instrumental	manasena	manasābhyām	manasaiḥ manasebhiḥ
Dative	manasāya	manasābhyām	manasebhyaḥ
Ablative	manasāt	manasābhyām	manasebhyaḥ
Genitive	manasasya	manasayoḥ	manasānām
Locative	manase	manasayoḥ	manaseṣu

Compound manasa -

Adverb -manasam -manasāt