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

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

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