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

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

*GRAMMAR*
lug -> RED 
 tufa -> GREEN 
 blicket -> BLUE 
 dax -> PURPLE 
 u1 zup u2 -> [u2] [u2] [u1] [u1] [u2] 
 x1 fep x2 -> [x2] [x2] [x1] [x2] 
 x1 kiki -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 