\documentclass[leqno]{book} 
\usepackage[T1]{fontenc}
\usepackage{amssymb}
\let\le\leqslant
\let\ge\geqslant
\usepackage{french,mep}
\fontfamily{knb}\selectfont
\renewcommand\rmdefault{knb} 
\newcommand{\point}{\raisebox{.5ex}{.}}
\begin{document} 
\guillemetsinallfonts   
\def\Tfont{kbd}
\input cart.txt
\end{document}
