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

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

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