*SUPPORT*
IN: wif dax OUT: GREEN RED
IN: dax blicket OUT: RED RED
IN: dax OUT: RED
IN: wif lug gazzer OUT: PURPLE GREEN PURPLE
IN: fep kiki OUT: YELLOW YELLOW
IN: wif OUT: GREEN
IN: fep lug fep OUT: YELLOW YELLOW YELLOW
IN: gazzer OUT: PURPLE
IN: dax gazzer OUT: RED PURPLE
IN: gazzer lug dax OUT: RED PURPLE RED
IN: dax dax lug fep OUT: RED YELLOW RED YELLOW
IN: gazzer blicket OUT: PURPLE PURPLE
IN: dax kiki OUT: RED RED
IN: gazzer fep blicket OUT: PURPLE YELLOW YELLOW

*QUERY*
IN: wif lug wif OUT: GREEN GREEN GREEN
IN: wif blicket kiki OUT: GREEN GREEN GREEN GREEN
IN: dax lug fep OUT: YELLOW RED YELLOW
IN: fep OUT: YELLOW
IN: gazzer kiki OUT: PURPLE PURPLE
IN: gazzer lug gazzer OUT: PURPLE PURPLE PURPLE
IN: wif lug dax OUT: RED GREEN RED
IN: wif blicket kiki kiki OUT: GREEN GREEN GREEN GREEN GREEN GREEN GREEN GREEN
IN: wif blicket OUT: GREEN GREEN
IN: fep blicket OUT: YELLOW YELLOW

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