*SUPPORT*
IN: zup tufa kiki OUT: RED GREEN RED
IN: zup OUT: RED
IN: kiki dax OUT: GREEN YELLOW
IN: kiki blicket zup OUT: RED RED GREEN
IN: fep blicket kiki OUT: GREEN GREEN PURPLE
IN: kiki OUT: GREEN
IN: zup blicket dax OUT: YELLOW YELLOW RED
IN: fep zup lug OUT: PURPLE RED RED
IN: fep blicket fep OUT: PURPLE PURPLE PURPLE
IN: kiki tufa dax OUT: GREEN YELLOW GREEN
IN: fep tufa dax OUT: PURPLE YELLOW PURPLE
IN: fep lug OUT: PURPLE PURPLE
IN: kiki tufa zup OUT: GREEN RED GREEN
IN: dax tufa dax OUT: YELLOW YELLOW YELLOW

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

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