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

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

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