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

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

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