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

*QUERY*
IN: gazzer kiki OUT: GREEN GREEN
IN: wif gazzer kiki OUT: PURPLE GREEN GREEN
IN: gazzer zup dax kiki OUT: BLUE BLUE GREEN
IN: wif zup gazzer kiki OUT: GREEN GREEN PURPLE
IN: blicket zup dax tufa dax OUT: BLUE BLUE BLUE RED
IN: blicket kiki OUT: RED RED
IN: dax dax OUT: BLUE BLUE
IN: dax OUT: BLUE
IN: blicket zup dax dax tufa wif OUT: BLUE PURPLE PURPLE BLUE RED
IN: wif kiki OUT: PURPLE PURPLE

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