*SUPPORT*
IN: fep dax blicket OUT: RED YELLOW
IN: fep kiki dax kiki OUT: RED GREEN GREEN
IN: fep tufa OUT: RED RED
IN: fep OUT: RED
IN: zup wif tufa OUT: BLUE BLUE BLUE BLUE
IN: fep kiki wif OUT: RED GREEN RED GREEN
IN: fep dax zup OUT: RED BLUE
IN: blicket dax fep OUT: YELLOW RED
IN: kiki fep dax blicket OUT: GREEN RED YELLOW
IN: kiki kiki zup tufa OUT: GREEN GREEN BLUE GREEN GREEN BLUE
IN: kiki dax fep OUT: GREEN RED
IN: zup dax blicket OUT: BLUE YELLOW
IN: zup OUT: BLUE
IN: blicket dax blicket OUT: YELLOW YELLOW

*QUERY*
IN: kiki dax fep tufa wif OUT: GREEN RED GREEN RED GREEN RED GREEN RED
IN: kiki OUT: GREEN
IN: kiki kiki dax blicket tufa OUT: GREEN GREEN YELLOW GREEN GREEN YELLOW
IN: zup dax kiki tufa OUT: BLUE GREEN BLUE GREEN
IN: zup tufa tufa OUT: BLUE BLUE BLUE BLUE
IN: zup tufa OUT: BLUE BLUE
IN: blicket kiki OUT: YELLOW GREEN
IN: fep blicket dax kiki OUT: RED YELLOW GREEN
IN: fep dax zup tufa OUT: RED BLUE RED BLUE
IN: blicket OUT: YELLOW

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