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

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

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