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

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

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