In the closed position {HEAD ~ a portion} of {TAIL ~ the display} is obstructed by the keyboard unit, and in the open position the display is unobstructed by the keyboard unit 
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In the closed position { HEAD ~ a portion } of { TAIL ~ the display } is obstructed by the keyboard unit , and in the open position the display is unobstructed by the keyboard unit
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH