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

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

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