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

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

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