{HEAD ~ The collection surface} of {TAIL ~ the swab} thus maintains contact with the rehydrated media plug 
of
{ HEAD ~ The collection surface } of { TAIL ~ the swab } thus maintains contact with the rehydrated media plug
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH