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

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

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