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

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

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