\input plnfss
\setfontencoding{T5}    % default is OT1 by plnfss

\input plainenc         % load support for inputenc mechanism
\input dblaccnt

\fontencoding{T5}       % load the T5 encoding definition file (t5enc.def)
\inputencoding{viscii}  % set current input encoding to viscii.

% some LaTeX commands used in testlatex.tex
\let\End=\end
\def\begin#1{\csname begin#1\endcsname}
\def\end#1{\csname end#1\endcsname}
\def\begindocument{\rmfamily}
\def\enddocument{\vfil\eject\endinput}
\def\documentclass#1{}
\def\usepackage#1{}
\def\section#1{%
    \bigbreak
    \vskip\parskip
    \leftline{\setfontsize{15pt}\normalfont\bf #1}
    \smallskip
}
\def\\{\hfil\break}
\def\vspace#1{\vadjust{\vskip #1}}
\def\MakeUppercase#1{\edef\x{\uppercase{#1}}\x}
\def\MakeLowercase#1{\edef\x{\lowercase{#1}}\x}

\input testlatex.tex
\End