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

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

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