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

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

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