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

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

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