altering in the buffer memory the data of {TAIL ~ content} of {HEAD ~ the identified memory cell} to correspond to said one of said first and second multi states; and 
altering in the buffer memory the data of { TAIL ~ content } of { HEAD ~ the identified memory cell } to correspond to said one of said first and second multi states ; and
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH