*SUPPORT*
IN: kiki dax lug dax OUT: YELLOW BLUE BLUE
IN: tufa lug kiki zup kiki lug kiki OUT: YELLOW GREEN YELLOW YELLOW
IN: gazzer tufa gazzer zup dax fep kiki OUT: RED GREEN RED BLUE YELLOW
IN: tufa lug kiki fep kiki dax lug gazzer OUT: YELLOW GREEN YELLOW RED BLUE
IN: kiki lug gazzer OUT: RED YELLOW
IN: dax OUT: BLUE
IN: kiki tufa lug gazzer OUT: YELLOW RED GREEN
IN: kiki lug tufa OUT: GREEN YELLOW
IN: tufa lug gazzer OUT: RED GREEN
IN: kiki lug kiki OUT: YELLOW YELLOW
IN: kiki dax lug tufa OUT: YELLOW GREEN BLUE
IN: dax lug gazzer OUT: RED BLUE
IN: gazzer OUT: RED
IN: tufa lug kiki OUT: YELLOW GREEN

*QUERY*
IN: dax dax OUT: BLUE BLUE
IN: gazzer lug tufa OUT: GREEN RED
IN: dax gazzer fep kiki zup kiki OUT: BLUE RED YELLOW YELLOW
IN: dax lug dax OUT: BLUE BLUE
IN: gazzer zup gazzer OUT: RED RED
IN: kiki lug gazzer fep kiki OUT: RED YELLOW YELLOW
IN: kiki gazzer lug kiki OUT: YELLOW YELLOW RED
IN: tufa OUT: GREEN
IN: kiki dax OUT: YELLOW BLUE
IN: kiki OUT: YELLOW

*GRAMMAR*
tufa -> GREEN 
 dax -> BLUE 
 gazzer -> RED 
 kiki -> YELLOW 
 x1 fep x2 -> [x1] [x2] 
 u1 lug u2 -> [u2] [u1] 
 x1 zup x2 -> [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 