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

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

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