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

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

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