*SUPPORT*
IN: dax zup gazzer zup tufa zup OUT: GREEN RED GREEN BLUE GREEN
IN: dax zup gazzer zup blicket zup OUT: GREEN GREEN BLUE GREEN
IN: tufa zup tufa blicket tufa blicket tufa OUT: RED RED RED GREEN RED
IN: tufa zup OUT: RED GREEN
IN: tufa tufa blicket zup blicket fep OUT: YELLOW GREEN RED RED
IN: fep kiki fep OUT: YELLOW YELLOW YELLOW
IN: dax OUT: BLUE
IN: dax fep OUT: BLUE YELLOW
IN: tufa OUT: RED
IN: fep OUT: YELLOW
IN: zup tufa dax OUT: GREEN RED BLUE
IN: tufa blicket tufa OUT: RED RED
IN: tufa fep OUT: RED YELLOW
IN: fep tufa OUT: YELLOW RED

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

*GRAMMAR*
fep -> YELLOW 
 dax -> BLUE 
 tufa -> RED 
 zup -> GREEN 
 x1 blicket u1 -> [u1] [x1] 
 x1 gazzer x2 -> [x2] [x1] 
 x1 kiki x2 -> [x1] [x2] [x2] 
 u1 x1 -> [u1] [x1] 
 