*SUPPORT*
IN: dax gazzer zup dax OUT: RED RED RED RED
IN: blicket OUT: BLUE
IN: dax blicket OUT: RED BLUE
IN: wif gazzer OUT: GREEN GREEN
IN: dax blicket dax gazzer zup kiki OUT: RED BLUE RED RED YELLOW YELLOW
IN: dax gazzer zup blicket OUT: RED RED BLUE BLUE
IN: kiki wif OUT: YELLOW GREEN
IN: blicket gazzer OUT: BLUE BLUE
IN: wif wif fep wif OUT: GREEN GREEN GREEN GREEN GREEN GREEN GREEN GREEN
IN: blicket zup dax OUT: BLUE RED RED
IN: kiki gazzer fep wif OUT: YELLOW YELLOW YELLOW YELLOW GREEN YELLOW YELLOW GREEN
IN: dax gazzer OUT: RED RED
IN: kiki fep wif OUT: YELLOW YELLOW GREEN YELLOW GREEN
IN: wif kiki OUT: GREEN YELLOW

*QUERY*
IN: dax zup wif OUT: RED GREEN GREEN
IN: dax OUT: RED
IN: dax zup kiki zup dax OUT: RED YELLOW YELLOW RED RED
IN: wif OUT: GREEN
IN: kiki OUT: YELLOW
IN: blicket blicket OUT: BLUE BLUE
IN: blicket gazzer zup blicket OUT: BLUE BLUE BLUE BLUE
IN: wif fep kiki OUT: GREEN GREEN YELLOW GREEN YELLOW
IN: blicket gazzer fep dax OUT: BLUE BLUE BLUE BLUE RED BLUE BLUE RED
IN: wif wif OUT: GREEN GREEN

*GRAMMAR*
wif -> GREEN 
 kiki -> YELLOW 
 blicket -> BLUE 
 dax -> RED 
 x1 fep u1 -> [x1] [x1] [u1] [x1] [u1] 
 x1 zup u1 -> [x1] [u1] [u1] 
 u1 gazzer -> [u1] [u1] 
 u1 x1 -> [u1] [x1] 
 