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

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

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