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