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

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

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