{HEAD ~ The menu items} of {TAIL ~ each device type menu} are orderable to specify the boot order for devices of the device type 
of
{ HEAD ~ The menu items } of { TAIL ~ each device type menu } are orderable to specify the boot order for devices of the device type
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH