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

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

*GRAMMAR*
gazzer -> YELLOW 
 kiki -> RED 
 zup -> BLUE 
 wif -> GREEN 
 u1 lug x1 -> [x1] [u1] 
 u1 fep u2 -> [u2] [u1] 
 x1 tufa x2 -> [x2] [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 