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

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

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