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

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

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