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

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

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