{TAIL ~ The matrix arrangement} is embodied, for example, symmetrical in reference to {HEAD ~ a horizontal and vertical 0° axis} 
{ TAIL ~ The matrix arrangement } is embodied , for example , symmetrical in reference to { HEAD ~ a horizontal and vertical 0 ° axis }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD