Pāṇini sūtras

ḍā, rau and ras are substituted respectively in the room of the three-affixes of the third person of luṭ (First-future), both in the Parasmaipada and the Atmanepada.

1. luṭaḥलुटः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   lल्	luṭलुट्	luṭaḥलुटः	periphrastic future	luṭलुट् + plus aḥअः

2. prathamasyaप्रथमस्य

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	prathamaप्रथम	prathamasyaप्रथमस्य	third	prathamप्रथम् + plus asyaअस्य

3. ḍā+rau+rasaḥडा+रौ+रसः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   ḍड्	ḍāडा	ḍāडा	ḍāडा	ḍड् + plus āआ
   rर्	rauरौ	rauरौ	rauरौ	rauरौ
   rर्	rasरस्	rasaḥरसः	rasरस्	rasरस् + plus aḥअः