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

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

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