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

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

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