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

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

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