{HEAD ~ The drivers} are assigned to {TAIL ~ the rests} and butt against a trailing edge of the printed products  
are assigned to
{ HEAD ~ The drivers } are assigned to { TAIL ~ the rests } and butt against a trailing edge of the printed products
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH