शाखेयं प्रतिशाखा तु नित्यमन्यपदा स्मृता । यद्यस्य भवेदन्तस्तदन्ताहरणं बुधैः ॥ २५२॥
The Śākhā and Pratiśākhā are always regarded as anyapadā (variant forms). Whatever forms the end of each is considered its conclusion by the learned.
english translation