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

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

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