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

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

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