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

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

*GRAMMAR*
dax -> BLUE 
 gazzer -> PINK 
 lug -> GREEN 
 kiki -> YELLOW 
 x1 tufa x2 -> [x2] [x2] [x1] [x1] 
 u1 fep u2 -> [u2] [u1] 
 u1 zup x1 -> [u1] [x1] 
 u1 x1 -> [u1] [x1] 
 