{TAIL ~ 2N+1 rows} and {HEAD ~ 2M+1 columns}, wherein N and M are integers, said 2N+1 rows and 2M+1 columns comprising at least three rows and at least five columns or at least five rows and at least three columns 
{ TAIL ~ 2N+1 rows } and { HEAD ~ 2M+1 columns } , wherein N and M are integers , said 2N+1 rows and 2M+1 columns comprising at least three rows and at least five columns or at least five rows and at least three columns
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH