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

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

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