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

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

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