Such a propagated signal may take {TAIL ~ any} of {HEAD ~ a variety} of forms, including, but not limited to, electro magnetic, optical, or any suitable combination thereof, 
Such a propagated signal may take { TAIL ~ any } of { HEAD ~ a variety } of forms , including , but not limited to , electro magnetic , optical , or any suitable combination thereof ,
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH