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