Here, lands 4 are divided into {HEAD ~ one third and two thirds sections} from {TAIL ~ alternating ends} on adjacent lands 4 
Here , lands 4 are divided into { HEAD ~ one third and two thirds sections } from { TAIL ~ alternating ends } on adjacent lands 4
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH