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

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

*GRAMMAR*
zup -> PINK 
 tufa -> YELLOW 
 fep -> RED 
 kiki -> GREEN 
 u1 gazzer u2 -> [u2] [u1] 
 x1 wif x2 -> [x1] [x1] [x2] 
 x1 dax u1 -> [x1] [u1] 
 u1 x1 -> [u1] [x1] 
 