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

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

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