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