In writing, {HEAD ~ the n transistors} in the read circuits form with {TAIL ~ two p transistors} NOT circuits whose outputs form the data lines 
In writing , { HEAD ~ the n transistors } in the read circuits form with { TAIL ~ two p transistors } NOT circuits whose outputs form the data lines
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH