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

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

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