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

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

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