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

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

*GRAMMAR*
kiki -> YELLOW 
 lug -> BLUE 
 zup -> RED 
 wif -> GREEN 
 u1 dax u2 -> [u1] [u1] [u2] [u2] 
 u1 tufa u2 -> [u1] [u1] [u2] 
 x1 fep x2 -> [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 