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

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

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