Declension table of ?yāsya

Neuter	Singular	Dual	Plural
Nominative	yāsyam	yāsye	yāsyāni
Vocative	yāsya	yāsye	yāsyāni
Accusative	yāsyam	yāsye	yāsyāni
Instrumental	yāsyena	yāsyābhyām	yāsyaiḥ
Dative	yāsyāya	yāsyābhyām	yāsyebhyaḥ
Ablative	yāsyāt	yāsyābhyām	yāsyebhyaḥ
Genitive	yāsyasya	yāsyayoḥ	yāsyānām
Locative	yāsye	yāsyayoḥ	yāsyeṣu

Compound yāsya -

Adverb -yāsyam -yāsyāt