Additionally, {HEAD ~ the stubs} facilitate {TAIL ~ laser removal} of portions 56, leaving enshortened stubs 58 
facilitate
Additionally , { HEAD ~ the stubs } facilitate { TAIL ~ laser removal } of portions 56 , leaving enshortened stubs 58
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH