Declension table of ?rāmāyaṇarahasya

Neuter	Singular	Dual	Plural
Nominative	rāmāyaṇarahasyam	rāmāyaṇarahasye	rāmāyaṇarahasyāni
Vocative	rāmāyaṇarahasya	rāmāyaṇarahasye	rāmāyaṇarahasyāni
Accusative	rāmāyaṇarahasyam	rāmāyaṇarahasye	rāmāyaṇarahasyāni
Instrumental	rāmāyaṇarahasyena	rāmāyaṇarahasyābhyām	rāmāyaṇarahasyaiḥ
Dative	rāmāyaṇarahasyāya	rāmāyaṇarahasyābhyām	rāmāyaṇarahasyebhyaḥ
Ablative	rāmāyaṇarahasyāt	rāmāyaṇarahasyābhyām	rāmāyaṇarahasyebhyaḥ
Genitive	rāmāyaṇarahasyasya	rāmāyaṇarahasyayoḥ	rāmāyaṇarahasyānām
Locative	rāmāyaṇarahasye	rāmāyaṇarahasyayoḥ	rāmāyaṇarahasyeṣu

Compound rāmāyaṇarahasya -

Adverb -rāmāyaṇarahasyam -rāmāyaṇarahasyāt