For example, the number of {TAIL ~ pixels} at {HEAD ~ the right area} can be designed to be different from the left area 
For example , the number of { TAIL ~ pixels } at { HEAD ~ the right area } can be designed to be different from the left area
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH