The first and second adhesive strips and {HEAD ~ the Y site identification element} are contained within {TAIL ~ a packet} having an openable side 
are contained within
The first and second adhesive strips and { HEAD ~ the Y site identification element } are contained within { TAIL ~ a packet } having an openable side
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH