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