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

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

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