.1C .PS 6i scale = 100 xm=.3i ym=.3i w1=1.5i w2=4i x=6i y=8.75i yy=y-3*ym-w2 box invis ht y wid x with .sw at 0,0 .ps 18 box ht w2 wid w2 with .n at x/2,y-ym box ht w1 wid w1 with .ne at (x+w2)/2,yy .ps "\*(ZX" at x/2,y-w2-1.8*ym "\*(ZZ" at x/2,y-w2-2.4*ym "\*(ZY" rjust at x/2+w2/2-w1-xm,yy-w1+.05i .PE