Declension table of ?dvādaśāṃsa

Masculine	Singular	Dual	Plural
Nominative	dvādaśāṃsaḥ	dvādaśāṃsau	dvādaśāṃsāḥ
Vocative	dvādaśāṃsa	dvādaśāṃsau	dvādaśāṃsāḥ
Accusative	dvādaśāṃsam	dvādaśāṃsau	dvādaśāṃsān
Instrumental	dvādaśāṃsena	dvādaśāṃsābhyām	dvādaśāṃsaiḥ dvādaśāṃsebhiḥ
Dative	dvādaśāṃsāya	dvādaśāṃsābhyām	dvādaśāṃsebhyaḥ
Ablative	dvādaśāṃsāt	dvādaśāṃsābhyām	dvādaśāṃsebhyaḥ
Genitive	dvādaśāṃsasya	dvādaśāṃsayoḥ	dvādaśāṃsānām
Locative	dvādaśāṃse	dvādaśāṃsayoḥ	dvādaśāṃseṣu

Compound dvādaśāṃsa -

Adverb -dvādaśāṃsam -dvādaśāṃsāt