Declension table of ?yasyamāna

Neuter	Singular	Dual	Plural
Nominative	yasyamānam	yasyamāne	yasyamānāni
Vocative	yasyamāna	yasyamāne	yasyamānāni
Accusative	yasyamānam	yasyamāne	yasyamānāni
Instrumental	yasyamānena	yasyamānābhyām	yasyamānaiḥ
Dative	yasyamānāya	yasyamānābhyām	yasyamānebhyaḥ
Ablative	yasyamānāt	yasyamānābhyām	yasyamānebhyaḥ
Genitive	yasyamānasya	yasyamānayoḥ	yasyamānānām
Locative	yasyamāne	yasyamānayoḥ	yasyamāneṣu

Compound yasyamāna -

Adverb -yasyamānam -yasyamānāt