beginchar(oct"216",.8em#,7cap#/7,dth#); "Oligon*diplis";
z0 = .5*(w,h);
addto currentpicture also OLIGON;
pickup pencircle scaled pt;
drawdot z0 shifted (-.1w,-.6h);
drawdot z0 shifted (.1w,-.6h);
endchar;