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

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

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