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

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

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