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

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

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