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

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

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