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