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

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

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