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

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

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