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

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

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