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

*QUERY*
IN: dax fep dax OUT: PURPLE PURPLE
IN: tufa fep zup wif zup OUT: GREEN GREEN PINK
IN: tufa lug kiki fep kiki OUT: PINK RED RED
IN: zup fep kiki lug dax zup OUT: RED GREEN PURPLE GREEN
IN: zup tufa fep kiki OUT: GREEN RED PINK
IN: dax fep kiki OUT: RED PURPLE
IN: kiki fep kiki OUT: RED RED
IN: tufa wif zup fep tufa OUT: PINK GREEN PINK
IN: tufa kiki lug tufa OUT: PINK RED PINK
IN: kiki zup OUT: RED GREEN

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