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

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

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