*SUPPORT*
IN: kiki OUT: PURPLE
IN: zup dax fep gazzer zup OUT: BLUE GREEN BLUE
IN: zup gazzer kiki OUT: BLUE PURPLE
IN: fep gazzer fep OUT: GREEN GREEN
IN: kiki tufa kiki tufa OUT: PURPLE PINK PURPLE PINK
IN: tufa OUT: PINK
IN: fep zup gazzer zup OUT: GREEN BLUE BLUE
IN: kiki dax zup gazzer zup OUT: PURPLE BLUE BLUE
IN: tufa lug kiki OUT: PURPLE PURPLE PINK
IN: tufa zup OUT: PINK BLUE
IN: fep OUT: GREEN
IN: zup tufa dax zup gazzer zup OUT: BLUE PINK BLUE BLUE
IN: zup OUT: BLUE
IN: kiki gazzer fep gazzer fep gazzer kiki OUT: PURPLE GREEN GREEN PURPLE

*QUERY*
IN: zup fep OUT: BLUE GREEN
IN: tufa lug zup OUT: BLUE BLUE PINK
IN: zup zup gazzer kiki OUT: BLUE BLUE PURPLE
IN: tufa gazzer kiki dax zup OUT: PINK PURPLE BLUE
IN: kiki fep OUT: PURPLE GREEN
IN: fep tufa gazzer fep gazzer fep OUT: GREEN PINK GREEN GREEN
IN: kiki gazzer kiki gazzer tufa OUT: PURPLE PURPLE PINK
IN: kiki zup gazzer zup dax fep OUT: PURPLE BLUE BLUE GREEN
IN: fep dax kiki dax tufa OUT: GREEN PURPLE PINK
IN: tufa gazzer fep dax fep OUT: PINK GREEN GREEN

*GRAMMAR*
zup -> BLUE 
 fep -> GREEN 
 tufa -> PINK 
 kiki -> PURPLE 
 x1 lug x2 -> [x2] [x2] [x1] 
 x1 gazzer u1 -> [x1] [u1] 
 x1 dax u1 -> [x1] [u1] 
 u1 x1 -> [u1] [x1] 
 