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

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

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