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

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

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