adding {HEAD ~ a catalyst} into {TAIL ~ the water} to polymerize the monomer in the micell 
adding { HEAD ~ a catalyst } into { TAIL ~ the water } to polymerize the monomer in the micell
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH