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

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

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