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

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

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