{TAIL ~ The main unit} includes a display and {HEAD ~ the keyboard unit} includes a full alphabet keyboard 
{ TAIL ~ The main unit } includes a display and { HEAD ~ the keyboard unit } includes a full alphabet keyboard
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH