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

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

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