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

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

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