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

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

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