\input envmac2.tex
\envformat{C5}

\letter{
\addr{
\arow{Fakultní poštou}
\arow{~}
\arow{Zdeňka Crkalová}
\arow{MÚ, MFF UK}
\arow{Sokolovská 83}
\arow{186\thinspace75~~Praha 8}
\arow{~}
}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\bye