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

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

*GRAMMAR*
fep -> BLUE 
 kiki -> YELLOW 
 zup -> RED 
 dax -> GREEN 
 x1 tufa x2 -> [x2] [x1] 
 u1 blicket x1 -> [u1] [x1] 
 x1 wif -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 