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

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

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