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

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

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