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

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

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