{HEAD ~ A memory cell} of an SRAM has {TAIL ~ two drive MISFETs} and two vertical MISFETs 
has
{ HEAD ~ A memory cell } of an SRAM has { TAIL ~ two drive MISFETs } and two vertical MISFETs
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH