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

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

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