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

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

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