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

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

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