For example, a metal layer connects {TAIL ~ the two sub regions} of {HEAD ~ center region} 34 
For example , a metal layer connects { TAIL ~ the two sub regions } of { HEAD ~ center region } 34
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH