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

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

*GRAMMAR*
dax -> PURPLE 
 lug -> BLUE 
 tufa -> GREEN 
 fep -> RED 
 x1 blicket u1 -> [u1] [x1] 
 u1 kiki -> [u1] [u1] [u1] 
 x1 zup x2 -> [x2] [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 