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

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

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