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