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

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

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