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