Declension table of ?manasa

Neuter	Singular	Dual	Plural
Nominative	manasam	manase	manasāni
Vocative	manasa	manase	manasāni
Accusative	manasam	manase	manasāni
Instrumental	manasena	manasābhyām	manasaiḥ
Dative	manasāya	manasābhyām	manasebhyaḥ
Ablative	manasāt	manasābhyām	manasebhyaḥ
Genitive	manasasya	manasayoḥ	manasānām
Locative	manase	manasayoḥ	manaseṣu

Compound manasa -

Adverb -manasam -manasāt