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

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

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