*SUPPORT*
IN: fep OUT: RED
IN: fep tufa OUT: RED RED RED RED RED
IN: kiki tufa OUT: GREEN GREEN GREEN GREEN GREEN
IN: fep fep lug blicket kiki OUT: RED RED GREEN BLUE
IN: fep blicket dax OUT: PURPLE RED
IN: dax blicket fep OUT: RED PURPLE
IN: dax dax zup OUT: PURPLE PURPLE PURPLE
IN: lug blicket kiki OUT: GREEN BLUE
IN: lug blicket dax OUT: PURPLE BLUE
IN: dax OUT: PURPLE
IN: fep blicket fep OUT: RED RED
IN: lug tufa OUT: BLUE BLUE BLUE BLUE BLUE
IN: kiki blicket kiki OUT: GREEN GREEN
IN: fep zup OUT: RED RED

*QUERY*
IN: dax zup OUT: PURPLE PURPLE
IN: kiki lug OUT: GREEN BLUE
IN: lug zup OUT: BLUE BLUE
IN: kiki OUT: GREEN
IN: lug OUT: BLUE
IN: kiki kiki blicket fep OUT: GREEN RED GREEN
IN: kiki blicket fep OUT: RED GREEN
IN: dax blicket kiki OUT: GREEN PURPLE
IN: kiki blicket lug OUT: BLUE GREEN
IN: kiki zup OUT: GREEN GREEN

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