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

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

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