For example, an implementation may be performed as a method, or embodied as an apparatus configured to perform a set of operations, or embodied as an apparatus storing instructions for performing {TAIL ~ a set} of operations, or embodied in {HEAD ~ a signal} 
For example , an implementation may be performed as a method , or embodied as an apparatus configured to perform a set of operations , or embodied as an apparatus storing instructions for performing { TAIL ~ a set } of operations , or embodied in { HEAD ~ a signal }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD