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

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

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