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

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

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