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

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

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