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

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

*GRAMMAR*
fep -> GREEN 
 kiki -> PINK 
 tufa -> BLUE 
 dax -> RED 
 x1 wif u1 -> [u1] [x1] 
 x1 gazzer x2 -> [x2] [x1] 
 x1 lug x2 -> [x1] [x2] [x1] [x1] [x2] 
 u1 x1 -> [u1] [x1] 
 