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

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

*GRAMMAR*
fep -> GREEN 
 dax -> YELLOW 
 wif -> RED 
 tufa -> BLUE 
 u1 gazzer u2 -> [u1] [u2] 
 x1 zup x2 -> [x1] [x2] 
 x1 lug -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 