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

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

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