*SUPPORT*
IN: dax OUT: RED
IN: dax lug OUT: RED RED RED
IN: kiki OUT: BLUE
IN: kiki zup tufa OUT: YELLOW BLUE
IN: dax lug blicket fep OUT: RED RED RED PINK
IN: kiki zup dax OUT: RED BLUE
IN: dax fep tufa lug OUT: RED PINK YELLOW YELLOW YELLOW
IN: kiki fep lug OUT: BLUE PINK PINK PINK
IN: tufa zup fep blicket fep blicket dax OUT: PINK YELLOW PINK RED
IN: dax zup dax OUT: RED RED
IN: tufa zup fep blicket dax OUT: PINK YELLOW RED
IN: kiki blicket fep OUT: BLUE PINK
IN: kiki zup kiki OUT: BLUE BLUE
IN: tufa zup tufa OUT: YELLOW YELLOW

*QUERY*
IN: dax fep zup fep OUT: RED PINK PINK
IN: tufa OUT: YELLOW
IN: kiki tufa zup tufa blicket fep blicket kiki OUT: BLUE YELLOW YELLOW PINK BLUE
IN: kiki lug OUT: BLUE BLUE BLUE
IN: dax zup dax blicket tufa OUT: RED RED YELLOW
IN: fep fep dax OUT: PINK PINK RED
IN: fep tufa zup tufa blicket fep blicket dax OUT: PINK YELLOW YELLOW PINK RED
IN: tufa lug OUT: YELLOW YELLOW YELLOW
IN: kiki lug blicket fep blicket kiki blicket fep OUT: BLUE BLUE BLUE PINK BLUE PINK
IN: fep tufa zup dax OUT: PINK RED YELLOW

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