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

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

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