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

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

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