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

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

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