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

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

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