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

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

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