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

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

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