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