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

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

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