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

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

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