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

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

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