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

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

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