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

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

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