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

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

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