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

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

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