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

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

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