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

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

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