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

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

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