*SUPPORT*
IN: dax dax dax zup kiki OUT: GREEN GREEN YELLOW GREEN YELLOW
IN: gazzer lug zup gazzer OUT: PINK PINK BLUE PINK
IN: lug OUT: BLUE
IN: gazzer tufa gazzer fep OUT: PINK PINK PINK PINK PINK PINK PINK PINK
IN: gazzer zup lug OUT: BLUE PINK BLUE
IN: dax tufa dax OUT: GREEN GREEN
IN: kiki zup gazzer OUT: PINK YELLOW PINK
IN: lug gazzer kiki OUT: BLUE PINK YELLOW
IN: dax zup kiki OUT: YELLOW GREEN YELLOW
IN: kiki tufa lug OUT: BLUE YELLOW
IN: kiki OUT: YELLOW
IN: gazzer tufa lug zup gazzer OUT: PINK BLUE PINK PINK
IN: lug tufa kiki kiki zup dax OUT: YELLOW GREEN YELLOW GREEN BLUE
IN: gazzer lug zup dax OUT: PINK GREEN BLUE GREEN

*QUERY*
IN: gazzer tufa lug OUT: BLUE PINK
IN: dax zup gazzer OUT: PINK GREEN PINK
IN: gazzer zup gazzer OUT: PINK PINK PINK
IN: gazzer OUT: PINK
IN: kiki zup kiki OUT: YELLOW YELLOW YELLOW
IN: gazzer tufa dax tufa lug lug zup lug OUT: BLUE BLUE BLUE BLUE GREEN PINK
IN: dax tufa dax zup lug OUT: BLUE GREEN BLUE GREEN
IN: gazzer lug OUT: PINK BLUE
IN: kiki fep OUT: YELLOW YELLOW YELLOW YELLOW
IN: dax tufa lug zup lug OUT: BLUE BLUE BLUE GREEN

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