[tex4ht] incorrect conversion of some Russian characters

[Taichi Kato]

   I have noticed that some Russian characters are not
correctly converted to odt.

[source code]

\documentclass[12pt]{article}

\usepackage[OT2]{fontenc}
\usepackage[russian]{babel}

\begin{document}

\cyrd - \CYRD -- \cyrery - \CYRERY

\end{document}

   By using make4ht -f odt test.tex, \cyrd and \cyrery
are converted to different characters.
(Please compare with the output by ordinary LaTeX).
It looks like that there are errors in the table
of Cyrillic characters.  Can this be fixed by user's side?

I used make4ht version v0.3f included in TeX Live on
Debian GNU/Linux 11.