This means that {TAIL ~ the first grid structure} preferably has {HEAD ~ more grid fields} than the second grid structure 
This means that { TAIL ~ the first grid structure } preferably has { HEAD ~ more grid fields } than the second grid structure
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH