*SUPPORT*
IN: gazzer dax dax fep dax OUT: PURPLE RED PURPLE PURPLE
IN: lug zup tufa OUT: YELLOW GREEN
IN: lug OUT: GREEN
IN: lug zup lug OUT: GREEN GREEN
IN: tufa zup tufa OUT: YELLOW YELLOW
IN: lug blicket lug blicket gazzer fep dax OUT: GREEN GREEN PURPLE RED
IN: gazzer blicket tufa gazzer OUT: RED YELLOW RED
IN: lug lug zup dax OUT: PURPLE GREEN GREEN
IN: lug lug lug OUT: GREEN GREEN GREEN
IN: dax zup tufa OUT: YELLOW PURPLE
IN: dax zup lug OUT: GREEN PURPLE
IN: gazzer blicket gazzer OUT: RED RED
IN: dax OUT: PURPLE
IN: lug blicket dax OUT: GREEN PURPLE

*QUERY*
IN: dax fep tufa OUT: YELLOW PURPLE
IN: gazzer fep dax OUT: PURPLE RED
IN: lug blicket tufa lug zup tufa zup tufa OUT: GREEN YELLOW YELLOW YELLOW GREEN
IN: tufa blicket gazzer lug fep dax fep tufa OUT: YELLOW YELLOW PURPLE RED GREEN
IN: gazzer OUT: RED
IN: tufa gazzer fep dax OUT: PURPLE YELLOW RED
IN: gazzer blicket lug blicket lug zup dax OUT: RED GREEN PURPLE GREEN
IN: dax blicket lug OUT: PURPLE GREEN
IN: gazzer gazzer OUT: RED RED
IN: tufa OUT: YELLOW

*GRAMMAR*
dax -> PURPLE 
 gazzer -> RED 
 tufa -> YELLOW 
 lug -> GREEN 
 u1 blicket x1 -> [u1] [x1] 
 x1 fep x2 -> [x2] [x1] 
 x1 zup u1 -> [u1] [x1] 
 u1 x1 -> [u1] [x1] 
 