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

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

*GRAMMAR*
dax -> GREEN 
 tufa -> BLUE 
 gazzer -> RED 
 kiki -> YELLOW 
 x1 blicket x2 -> [x1] [x2] 
 u1 zup u2 -> [u2] [u1] 
 x1 wif -> [x1] [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 