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

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

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