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

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

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