{HEAD ~ The step} of forming fin structures forms {TAIL ~ fin structures} adjacent to the recessed sidewalls 
forms
{ HEAD ~ The step } of forming fin structures forms { TAIL ~ fin structures } adjacent to the recessed sidewalls
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH