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

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

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