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

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

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