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

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

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