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

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

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