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

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

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