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

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

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