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

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

*GRAMMAR*
fep -> GREEN 
 wif -> BLUE 
 dax -> RED 
 kiki -> PURPLE 
 x1 zup u1 -> [x1] [u1] 
 x1 lug x2 -> [x1] [x2] [x2] 
 u1 gazzer -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 