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

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

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