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

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

*GRAMMAR*
tufa -> BLUE 
 zup -> RED 
 fep -> GREEN 
 wif -> PURPLE 
 x1 kiki x2 -> [x1] [x2] [x2] 
 u1 dax u2 -> [u2] [u2] [u1] 
 u1 gazzer u2 -> [u2] [u2] [u1] 
 u1 x1 -> [u1] [x1] 
 