wherein m and {HEAD ~ n each} represent an integer ranging from 2 to 5 and {TAIL ~ p} is an integer ranging from 5 to 16 
wherein m and { HEAD ~ n each } represent an integer ranging from 2 to 5 and { TAIL ~ p } is an integer ranging from 5 to 16
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH