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

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

*GRAMMAR*
fep -> PURPLE 
 wif -> GREEN 
 tufa -> BLUE 
 dax -> RED 
 u1 kiki -> [u1] [u1] [u1] [u1] 
 u1 zup -> [u1] [u1] 
 x1 lug x2 -> [x2] [x2] [x1] 
 u1 x1 -> [u1] [x1] 
 