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

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

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