Preferably, the coded data includes at least one tag, each tag being indicative of the region identity and the position of {HEAD ~ the tag} within {TAIL ~ the region} 
Preferably , the coded data includes at least one tag , each tag being indicative of the region identity and the position of { HEAD ~ the tag } within { TAIL ~ the region }
OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL