Pāṇini sūtras

Short i is optionally substituted for the final of śā (śo) and chā (cho), before an affix beginning with t and having an indicatory k

1. śā+choḥशा+छोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   śश्	śāशा	śāशा	śāशा	śश् + plus āआ
   cच्	chāछा	choḥछोः	chāछा	chāछा + plus ḥः

2. anyatarasyāmअन्यतरस्याम्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	anyataraअन्यतर	anyatarasyāmअन्यतरस्याम्	optional	anyataraअन्यतर + plus syāmस्याम्

Anuvṛtti

1. k+itiक्+इति 7·4·40

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   kक्	kक्	kक्	KK	kक्
   iइ	itइत्	itiइति	itइत्	itइत् + plus iइ