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

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

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