\relax

\encoding

\setcommand\lc#1#2{#2}
\setcommand\uc#1#2{#1}

\nextslot{"1E}
\setslot{\lc{CYRYO}{cyruo}}\endsetslot
\nextslot{"3E}
\setslot{\uc{CYRYO}{cyruo}}\endsetslot

\inputetx{cmcyrl}

\endencoding