FINDB
Returns the starting position of a given text, using byte positions. FINDB is case sensitive.
FINDB( Find Text ; Text ; Position )
Find Text: The text or text expression to be found.
Text: the text in which the search is to be made.
Position: The position in the text where the search starts.
=FINDB("ᄫᄬ";"ᄩᄔᄕᄜᄝᄞᄠgᄢᄣᄫᄬá„ᄮᄯᄲᄶ";17) returns 19.