*SUPPORT*
IN: kiki gazzer dax gazzer fep OUT: RED BLUE PURPLE
IN: fep OUT: RED
IN: dax tufa lug OUT: GREEN BLUE
IN: kiki blicket dax OUT: BLUE BLUE PURPLE
IN: dax gazzer lug OUT: GREEN BLUE
IN: lug blicket kiki OUT: PURPLE PURPLE GREEN
IN: lug dax blicket lug OUT: GREEN GREEN GREEN BLUE
IN: lug lug tufa fep OUT: GREEN RED GREEN
IN: lug OUT: GREEN
IN: dax gazzer dax gazzer kiki tufa kiki OUT: PURPLE PURPLE BLUE BLUE
IN: lug gazzer dax tufa lug OUT: GREEN BLUE GREEN
IN: kiki tufa kiki OUT: PURPLE PURPLE
IN: fep tufa lug OUT: GREEN RED
IN: fep lug gazzer fep tufa fep OUT: RED RED RED GREEN

*QUERY*
IN: fep blicket kiki OUT: PURPLE PURPLE RED
IN: dax blicket kiki OUT: PURPLE PURPLE BLUE
IN: kiki OUT: PURPLE
IN: fep dax OUT: RED BLUE
IN: fep lug OUT: RED GREEN
IN: lug dax OUT: GREEN BLUE
IN: lug gazzer fep gazzer dax blicket dax OUT: BLUE BLUE BLUE RED GREEN
IN: lug fep blicket dax OUT: GREEN BLUE BLUE RED
IN: dax kiki tufa lug OUT: BLUE GREEN PURPLE
IN: fep gazzer kiki tufa kiki OUT: PURPLE PURPLE RED

*GRAMMAR*
fep -> RED 
 dax -> BLUE 
 lug -> GREEN 
 kiki -> PURPLE 
 u1 tufa u2 -> [u2] [u1] 
 u1 blicket u2 -> [u2] [u2] [u1] 
 u1 gazzer x1 -> [x1] [u1] 
 u1 x1 -> [u1] [x1] 
 