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

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

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