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

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

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