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

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

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