\newfam\gkf@m
\newskip\gr@@kbaselineskip
\font\twelvegrk=fibr84 scaled \magstep1
\font\twelvegrksl=fibo84 scaled \magstep1
\font\elevengrk=fibr84 scaled \magstephalf
\font\elevengrksl=fibo84 scaled \magstephalf
\font\tengrk=fibr84
\font\tengrksl=fibo84
\font\ninegrk=fibr849
\font\ninegrksl=fibo849
\font\eightgrk=fibr848
\font\eightgrksl=fibo848
\gdef\setgreek#1/#2 {%
  \def\f@ntp@int##1{\ifcase##1\toks0={zero}%
   \or\toks0={zero}\or\toks0={zero}\or\toks0={zero}% 1,2,3
   \or\toks0={zero}\or\toks0={zero}\or\toks0={zero}% 4,5,6
   \or\toks0={zero}% 7
   \or\toks0={eight}\or\toks0={nine}\or\toks0={ten}
   \or\toks0={eleven}\or\toks0={twelve}\fi
  }%
  \def\gksizep@int##1{\expandafter\gdef\csname ##1point\endcsname{%%
     \textfont\gkf@m=\csname ##1grk\endcsname
     \gdef\gk{\fam\gkf@m\csname ##1grk\endcsname}%
     \edef\gksl{\csname ##1grksl\endcsname}%
  }}%
  \global\gr@@kbaselineskip=#2pt
  \f@ntp@int{#1}%
      % Get the English for the fontsize into \toks0
  \expandafter\expandafter\expandafter\gksizep@int{\the\toks0}%
  \edef\gr@@kpoint{%
    \expandafter\noexpand\csname\the\toks0point\endcsname}%
  \csname\the\toks0point\endcsname
}
\message{Type \noexpand\setgreek10/12 to set 10pt greek on 12pt leading}
\message{ \noexpand\GK to start, \noexpand\RM to end greek }
