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

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

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