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

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

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