receiving a request to write the predetermined data to {TAIL ~ a page} to which {HEAD ~ data} has been written 
receiving a request to write the predetermined data to { TAIL ~ a page } to which { HEAD ~ data } has been written
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL