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

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

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