groucho$ awk 'BEGIN{xmin=999;xmax=-999;ymin=999;ymax=-999}$1=="m"||$1=="n"{if($
2>xmax)xmax=$2;if($2<xmin)xmin=$2;if($3<ymin)ymin=$3;if($3>ymax)ymax=$3}END{pri
nt xmin, xmax, ymin, ymax}' *.src
-40 165 -60 125
