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

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

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