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

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

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