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

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

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