{TAIL ~ The lettering guide} is mounted upon the planar surface for {HEAD ~ rectilinear movement} along a plurality of parallel steps 
{ TAIL ~ The lettering guide } is mounted upon the planar surface for { HEAD ~ rectilinear movement } along a plurality of parallel steps
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH