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

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

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