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

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

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