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

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

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