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

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

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