diagraphs and subscripting

Following these commands;
Superscripts: <cntrl-K> + [number key] + S
Subscripts: <cntril-K> + [number key] + s

Superscripting woks for me only with the numbers 2 and 3.
And I cannot achieve any subscripting of numbers.

On first line is 2 and 3 with an upper case S and on second line
with a lower case s.

² ³
₂ ₃

(file)encoding=utf-8

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- Eric Smith

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