The other ends of {TAIL ~ the cores} are spaced on {HEAD ~ either side} of the adjacent ends 
The other ends of { TAIL ~ the cores } are spaced on { HEAD ~ either side } of the adjacent ends
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH