Pāṇini sūtras

The affixes śatṛ and śānac are the substitutes of laṭ even when agreeing with what ends with a first case-affix, provided that it is in the vocative case.

1. sambodhaneसम्बोधने

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	sambodhanaसम्बोधन	sambodhaneसम्बोधने	vocative	sambodhanसम्बोधन् + plus eए

2. caच

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	besides	caच

Anuvṛtti

1. śatṛ+śānacauशतृ+शानचौ 3·2·124

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   śश्	śatṛशतृ	śatṛशतृ	śatṛशतृ	śatशत् + plus ṛऋ
   śश्	śānacशानच्	śānacauशानचौ	śānacशानच्	śānacशानच् + plus auऔ