*SUPPORT*
IN: fep dax OUT: RED RED
IN: wif dax OUT: PURPLE PURPLE
IN: fep OUT: RED
IN: tufa OUT: YELLOW
IN: fep gazzer kiki OUT: BLUE BLUE RED
IN: kiki OUT: BLUE
IN: tufa gazzer tufa OUT: YELLOW YELLOW YELLOW
IN: kiki dax OUT: BLUE BLUE
IN: wif zup tufa OUT: PURPLE YELLOW
IN: fep zup tufa OUT: RED YELLOW
IN: tufa tufa gazzer tufa OUT: YELLOW YELLOW YELLOW YELLOW
IN: kiki fep zup tufa OUT: BLUE RED YELLOW
IN: kiki wif gazzer kiki OUT: BLUE BLUE BLUE PURPLE
IN: fep gazzer tufa OUT: YELLOW YELLOW RED

*QUERY*
IN: fep kiki OUT: RED BLUE
IN: wif gazzer tufa OUT: YELLOW YELLOW PURPLE
IN: fep wif kiki zup wif OUT: RED PURPLE BLUE PURPLE
IN: fep fep tufa wif fep dax OUT: RED RED YELLOW PURPLE RED RED
IN: kiki kiki dax OUT: BLUE BLUE BLUE
IN: tufa dax OUT: YELLOW YELLOW
IN: fep wif OUT: RED PURPLE
IN: tufa gazzer wif OUT: PURPLE PURPLE YELLOW
IN: kiki kiki zup kiki OUT: BLUE BLUE BLUE
IN: kiki wif dax OUT: BLUE PURPLE PURPLE

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