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

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

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