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

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

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