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

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

*GRAMMAR*
gazzer -> BLUE 
 wif -> YELLOW 
 lug -> GREEN 
 kiki -> RED 
 u1 tufa u2 -> [u1] [u2] 
 x1 dax -> [x1] [x1] 
 x1 fep x2 -> [x1] [x2] [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 