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

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

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