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

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

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