During some period of the programming cycle {HEAD ~ the cross point switch routes data} from the data pad to {TAIL ~ the column} latch through the selected column 
to
During some period of the programming cycle { HEAD ~ the cross point switch routes data } from the data pad to { TAIL ~ the column } latch through the selected column
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH