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

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

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