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

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

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