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

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

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