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

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

*GRAMMAR*
tufa -> GREEN 
 dax -> PURPLE 
 lug -> RED 
 zup -> BLUE 
 x1 wif x2 -> [x2] [x1] [x2] [x1] 
 u1 gazzer -> [u1] [u1] [u1] 
 u1 kiki u2 -> [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 