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

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

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