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

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

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