*SUPPORT*
IN: zup dax blicket tufa OUT: PURPLE GREEN RED
IN: dax gazzer blicket dax OUT: RED RED BLUE
IN: dax OUT: RED
IN: dax lug zup OUT: RED PURPLE
IN: tufa lug gazzer OUT: GREEN BLUE
IN: zup blicket dax OUT: RED PURPLE
IN: gazzer gazzer OUT: BLUE BLUE
IN: dax blicket zup OUT: PURPLE RED
IN: zup blicket gazzer OUT: BLUE PURPLE
IN: zup dax lug tufa OUT: PURPLE RED GREEN
IN: tufa OUT: GREEN
IN: tufa tufa blicket gazzer OUT: GREEN BLUE GREEN
IN: gazzer blicket gazzer OUT: BLUE BLUE
IN: gazzer lug tufa OUT: BLUE GREEN

*QUERY*
IN: dax lug dax OUT: RED RED
IN: zup blicket tufa OUT: GREEN PURPLE
IN: zup lug zup OUT: PURPLE PURPLE
IN: gazzer blicket tufa OUT: GREEN BLUE
IN: dax blicket tufa fep dax OUT: RED GREEN RED
IN: dax lug dax fep zup gazzer OUT: PURPLE BLUE RED RED
IN: tufa blicket zup OUT: PURPLE GREEN
IN: gazzer lug dax fep dax blicket tufa OUT: GREEN RED BLUE RED
IN: tufa gazzer lug gazzer fep dax OUT: RED GREEN BLUE BLUE
IN: zup lug gazzer fep gazzer OUT: BLUE PURPLE BLUE

*GRAMMAR*
gazzer -> BLUE 
 tufa -> GREEN 
 dax -> RED 
 zup -> PURPLE 
 u1 blicket u2 -> [u2] [u1] 
 x1 fep x2 -> [x2] [x1] 
 u1 lug u2 -> [u1] [u2] 
 u1 x1 -> [u1] [x1] 
 