{HEAD ~ The full alphabet keyboard} is operable in {TAIL ~ both the closed position} and the open position 
is operable in
{ HEAD ~ The full alphabet keyboard } is operable in { TAIL ~ both the closed position } and the open position
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH