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

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

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