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

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

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