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

*QUERY*
IN: lug OUT: GREEN
IN: zup tufa OUT: BLUE BLUE
IN: lug blicket dax OUT: GREEN YELLOW
IN: dax wif OUT: YELLOW YELLOW
IN: lug tufa OUT: GREEN GREEN
IN: lug wif OUT: GREEN GREEN
IN: zup OUT: BLUE
IN: zup zup dax dax zup blicket dax OUT: BLUE BLUE YELLOW YELLOW BLUE YELLOW
IN: zup wif OUT: BLUE BLUE
IN: lug blicket zup OUT: GREEN BLUE

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