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

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

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