#
cat head.tex [0-9]*.tex tail.tex > sss.tex
/usr/lib/cpp -P sss.tex | expand | sed -e "s/\\tt/\\sf/g" > ss.tex
#cat head.tex [0-9]*.tex tail.tex|expand >sss.tex
#sed -e "s/\\tt/\\sf/g" sss.tex > ss.tex
latex ss
rm sss.tex