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

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

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